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15\left(-4\right)+6\left(3x-22\right)=10\left(2x-5\right)-90
Multiply both sides of the equation by 30, the least common multiple of 2,5,3.
-60+6\left(3x-22\right)=10\left(2x-5\right)-90
Multiply 15 and -4 to get -60.
-60+18x-132=10\left(2x-5\right)-90
Use the distributive property to multiply 6 by 3x-22.
-192+18x=10\left(2x-5\right)-90
Subtract 132 from -60 to get -192.
-192+18x=20x-50-90
Use the distributive property to multiply 10 by 2x-5.
-192+18x=20x-140
Subtract 90 from -50 to get -140.
-192+18x-20x=-140
Subtract 20x from both sides.
-192-2x=-140
Combine 18x and -20x to get -2x.
-2x=-140+192
Add 192 to both sides.
-2x=52
Add -140 and 192 to get 52.
x=\frac{52}{-2}
Divide both sides by -2.
x=-26
Divide 52 by -2 to get -26.