0.50x + 0.15(50) = 42.5
Solve the multiplication
0.50x + 7.5 = 42.5
Subtract 7.5 from both sides of the equation:
0.50x+7.5-7.5 = 42.5-7.5
0.50x = 35
Divide both sides by 0.50
0.50x/0.50 = 35/0.50
x = 70
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