2x + 5x + 3 = 9
The two and the five can be added together because they are multiplied by the same term
7x + 3 = 9
Subtract both sides of the equation by three
7x = 6
Divide both sides by seven
x = 6/7
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5x+18 = 2x+9 5x-2x = 9-18 3x = -9 x = -3 and y = 3
2x +1 = 5x-2 2x +3= 5x 3 = 3x x=1
-5x+3(x+8)=16-2x
If: x+9+5x = 21+2x Then: x = 3
x=4