Solve for x_1
x_{1}=435
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0.2x_{1}=87
Add 4 and 83 to get 87.
x_{1}=\frac{87}{0.2}
Divide both sides by 0.2.
x_{1}=\frac{870}{2}
Expand \frac{87}{0.2} by multiplying both numerator and the denominator by 10.
x_{1}=435
Divide 870 by 2 to get 435.
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