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40x+30
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40x+30
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80x-40x-\left(-30\right)
To find the opposite of 40x-30, find the opposite of each term.
80x-40x+30
The opposite of -30 is 30.
40x+30
Combine 80x and -40x to get 40x.
80x-40x-\left(-30\right)
To find the opposite of 40x-30, find the opposite of each term.
80x-40x+30
The opposite of -30 is 30.
40x+30
Combine 80x and -40x to get 40x.
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