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4\left(2x+3\right)-20=5\left(x-1\right)
Multiply both sides of the equation by 20, the least common multiple of 5,4.
8x+12-20=5\left(x-1\right)
Use the distributive property to multiply 4 by 2x+3.
8x-8=5\left(x-1\right)
Subtract 20 from 12 to get -8.
8x-8=5x-5
Use the distributive property to multiply 5 by x-1.
8x-8-5x=-5
Subtract 5x from both sides.
3x-8=-5
Combine 8x and -5x to get 3x.
3x=-5+8
Add 8 to both sides.
3x=3
Add -5 and 8 to get 3.
x=\frac{3}{3}
Divide both sides by 3.
x=1
Divide 3 by 3 to get 1.