Answer: x = -10 .
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Explanation:
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x + 42 + x + 65 = 87 ; Solve for "x" ;
2x + 107 = 87 .
Subtract "107" from each side of the equation:
2x + 107 − 107 = 87 − 107 ;
2x = -20 ;
Divide each side of the equation by "2" ; to isolate "x" on one side of the equation; and to solve for "x" ;
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2x / 2 = -20/2 ;
x = -10 .
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