Solve for x
x=-1
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20=10\left(x+3\right)
Variable x cannot be equal to -3 since division by zero is not defined. Multiply both sides of the equation by x+3.
20=10x+30
Use the distributive property to multiply 10 by x+3.
10x+30=20
Swap sides so that all variable terms are on the left hand side.
10x=20-30
Subtract 30 from both sides.
10x=-10
Subtract 30 from 20 to get -10.
x=\frac{-10}{10}
Divide both sides by 10.
x=-1
Divide -10 by 10 to get -1.
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