Har en opgave jeg ikke aner hvordan jeg løser, og min lærerinde kan ikke forklare det. Nogen der måske kan hjælpe?
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
150%"><span style="font-size:12.0pt;line-height:150%;font-family:"Times New Roman";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman";
mso-fareast-language:DA">I en pung er der kun 10'ere og 20'ere. Der er 3 gange så mange 10'ere som 20'ere, og der er 350 kr i alt. Hvor mange mønter er der?
</o:p>
<div style="mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.5pt;
padding:0cm 0cm 1.0pt 0cm">
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
150%;border:none;mso-border-bottom-alt:solid windowtext 1.5pt;padding:0cm;
mso-padding-alt:0cm 0cm 1.0pt 0cm"><span style="font-size:12.0pt;line-height:
150%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman";mso-fareast-language:DA">Bestem, hvad
<b style="mso-bidi-font-weight:
normal">
x<i style="mso-bidi-font-style:
normal">
skal stå for og opstil en ligning ud fra oplysningerne. Besvar spørgsmålet ved at løse ligningen.</o:p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
150%;border:none;mso-border-bottom-alt:solid windowtext 1.5pt;padding:0cm;
mso-padding-alt:0cm 0cm 1.0pt 0cm"><span style="font-size:12.0pt;line-height:
150%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman";mso-fareast-language:DA"> </o:p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
150%;border:none;mso-border-bottom-alt:solid windowtext 1.5pt;padding:0cm;
mso-padding-alt:0cm 0cm 1.0pt 0cm"><span style="font-size:12.0pt;line-height:
150%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman";mso-fareast-language:DA">Antal 20’ere = x</o:p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
150%;border:none;mso-border-bottom-alt:solid windowtext 1.5pt;padding:0cm;
mso-padding-alt:0cm 0cm 1.0pt 0cm"><span style="font-size:12.0pt;line-height:
150%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman";mso-fareast-language:DA">Antal 10’ere = 3*x</o:p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
150%;border:none;mso-border-bottom-alt:solid windowtext 1.5pt;padding:0cm;
mso-padding-alt:0cm 0cm 1.0pt 0cm"><span style="font-size:12.0pt;line-height:
150%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";
mso-bidi-font-family:"Times New Roman";mso-fareast-language:DA"> </o:p>
350 = x + 3 * x
