Solve for x
x = \frac{86}{17} = 5\frac{1}{17} \approx 5.058823529
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15x-78-2-10=5\left(5x-26\right)\times 4
Use the distributive property to multiply 3 by 5x-26.
15x-80-10=5\left(5x-26\right)\times 4
Subtract 2 from -78 to get -80.
15x-90=5\left(5x-26\right)\times 4
Subtract 10 from -80 to get -90.
15x-90=20\left(5x-26\right)
Multiply 5 and 4 to get 20.
15x-90=100x-520
Use the distributive property to multiply 20 by 5x-26.
15x-90-100x=-520
Subtract 100x from both sides.
-85x-90=-520
Combine 15x and -100x to get -85x.
-85x=-520+90
Add 90 to both sides.
-85x=-430
Add -520 and 90 to get -430.
x=\frac{-430}{-85}
Divide both sides by -85.
x=\frac{86}{17}
Reduce the fraction \frac{-430}{-85} to lowest terms by extracting and canceling out -5.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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