Solve for x
x=9
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0.4x=1.4+2.2
Add 2.2 to both sides.
0.4x=3.6
Add 1.4 and 2.2 to get 3.6.
x=\frac{3.6}{0.4}
Divide both sides by 0.4.
x=\frac{36}{4}
Expand \frac{3.6}{0.4} by multiplying both numerator and the denominator by 10.
x=9
Divide 36 by 4 to get 9.
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