Solve for x
x = \frac{100}{13} = 7\frac{9}{13} \approx 7.692307692
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7x+6x-10=90
Combine 2x and 5x to get 7x.
13x-10=90
Combine 7x and 6x to get 13x.
13x=90+10
Add 10 to both sides.
13x=100
Add 90 and 10 to get 100.
x=\frac{100}{13}
Divide both sides by 13.
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