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5x-15=2\left(x+3\right)
Use the distributive property to multiply 5 by x-3.
5x-15=2x+6
Use the distributive property to multiply 2 by x+3.
5x-15-2x=6
Subtract 2x from both sides.
3x-15=6
Combine 5x and -2x to get 3x.
3x=6+15
Add 15 to both sides.
3x=21
Add 6 and 15 to get 21.
x=\frac{21}{3}
Divide both sides by 3.
x=7
Divide 21 by 3 to get 7.