It would be 1 copy, and would cost $42.
39+3(1)=42$
30+12(1)=42$
39+3x, 30+12x are the equations
39+3(1)=42$
30+12(1)=42$
39+3x, 30+12x are the equations
Red bricks and grey bricks were used to build a decorative wall. The number of red bricks divided by number of grey bricks was 5
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