Solve for x
x=260
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20x+800+1800=30x
Use the distributive property to multiply 20 by x+40.
20x+2600=30x
Add 800 and 1800 to get 2600.
20x+2600-30x=0
Subtract 30x from both sides.
-10x+2600=0
Combine 20x and -30x to get -10x.
-10x=-2600
Subtract 2600 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-2600}{-10}
Divide both sides by -10.
x=260
Divide -2600 by -10 to get 260.
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