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5\left(x+1\right)+10x=20-2\left(1-x\right)
Multiply both sides of the equation by 10, the least common multiple of 2,5.
5x+5+10x=20-2\left(1-x\right)
Use the distributive property to multiply 5 by x+1.
15x+5=20-2\left(1-x\right)
Combine 5x and 10x to get 15x.
15x+5=20-2+2x
Use the distributive property to multiply -2 by 1-x.
15x+5=18+2x
Subtract 2 from 20 to get 18.
15x+5-2x=18
Subtract 2x from both sides.
13x+5=18
Combine 15x and -2x to get 13x.
13x=18-5
Subtract 5 from both sides.
13x=13
Subtract 5 from 18 to get 13.
x=\frac{13}{13}
Divide both sides by 13.
x=1
Divide 13 by 13 to get 1.