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3x+2x+4=20-\left(2x-5\right)
Use the distributive property to multiply 2 by x+2.
5x+4=20-\left(2x-5\right)
Combine 3x and 2x to get 5x.
5x+4=20-2x-\left(-5\right)
To find the opposite of 2x-5, find the opposite of each term.
5x+4=20-2x+5
The opposite of -5 is 5.
5x+4=25-2x
Add 20 and 5 to get 25.
5x+4+2x=25
Add 2x to both sides.
7x+4=25
Combine 5x and 2x to get 7x.
7x=25-4
Subtract 4 from both sides.
7x=21
Subtract 4 from 25 to get 21.
x=\frac{21}{7}
Divide both sides by 7.
x=3
Divide 21 by 7 to get 3.