Solve for x
x=1
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30x-\left(5x+4\right)=21
Multiply both sides of the equation by 3.
30x-5x-4=21
To find the opposite of 5x+4, find the opposite of each term.
25x-4=21
Combine 30x and -5x to get 25x.
25x=21+4
Add 4 to both sides.
25x=25
Add 21 and 4 to get 25.
x=\frac{25}{25}
Divide both sides by 25.
x=1
Divide 25 by 25 to get 1.
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