Solve for x
x = \frac{1215}{16} = 75\frac{15}{16} = 75.9375
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12x+4x=1215
Multiply 4 and 3 to get 12.
16x=1215
Combine 12x and 4x to get 16x.
x=\frac{1215}{16}
Divide both sides by 16.
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