Solve for x
x=4
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1.3x+2.6=7.8
Swap sides so that all variable terms are on the left hand side.
1.3x=7.8-2.6
Subtract 2.6 from both sides.
1.3x=5.2
Subtract 2.6 from 7.8 to get 5.2.
x=\frac{5.2}{1.3}
Divide both sides by 1.3.
x=\frac{52}{13}
Expand \frac{5.2}{1.3} by multiplying both numerator and the denominator by 10.
x=4
Divide 52 by 13 to get 4.
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