( x + ( - 3 ) - ( - 42 ) = - 45
Solve for x
x=-84
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x-3+42=-45
The opposite of -42 is 42.
x+39=-45
Add -3 and 42 to get 39.
x=-45-39
Subtract 39 from both sides.
x=-84
Subtract 39 from -45 to get -84.
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