Solve for x
x=3
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0.7x-1.2-0.3x=0
Subtract 0.3x from both sides.
0.4x-1.2=0
Combine 0.7x and -0.3x to get 0.4x.
0.4x=1.2
Add 1.2 to both sides. Anything plus zero gives itself.
x=\frac{1.2}{0.4}
Divide both sides by 0.4.
x=\frac{12}{4}
Expand \frac{1.2}{0.4} by multiplying both numerator and the denominator by 10.
x=3
Divide 12 by 4 to get 3.
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