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5\left(x+2\right)\times 2-5\times 5=\left(x+2\right)\left(1\times 5+3\right)
Variable x cannot be equal to -2 since division by zero is not defined. Multiply both sides of the equation by 5\left(x+2\right), the least common multiple of x+2,5.
\left(5x+10\right)\times 2-5\times 5=\left(x+2\right)\left(1\times 5+3\right)
Use the distributive property to multiply 5 by x+2.
10x+20-5\times 5=\left(x+2\right)\left(1\times 5+3\right)
Use the distributive property to multiply 5x+10 by 2.
10x+20-25=\left(x+2\right)\left(1\times 5+3\right)
Multiply -5 and 5 to get -25.
10x-5=\left(x+2\right)\left(1\times 5+3\right)
Subtract 25 from 20 to get -5.
10x-5=\left(x+2\right)\left(5+3\right)
Multiply 1 and 5 to get 5.
10x-5=\left(x+2\right)\times 8
Add 5 and 3 to get 8.
10x-5=8x+16
Use the distributive property to multiply x+2 by 8.
10x-5-8x=16
Subtract 8x from both sides.
2x-5=16
Combine 10x and -8x to get 2x.
2x=16+5
Add 5 to both sides.
2x=21
Add 16 and 5 to get 21.
x=\frac{21}{2}
Divide both sides by 2.