Answered


Simplify and solve this equation: 4m + 9 + 5m – 12 = 42.



A. m = –5
B. m = 4
C. m = 5
D. m = -4

Answer :

KhaRNate
4m + 9 + 5m - 12 = 42
9m + 9 -12 = 42
9m -3 = 42
9m = 42 + 3 
9m = 45 
m= 45/9
m= 5
Answer is C. 
vannialvionitaovavh6
so first separate the expressions and numbers so it will be easier to solve. expressions on the left and numbers on the right or vice versa. (be carefull with the addition and subtraction signs)
4m+9+5m-12=42
5m+4m=42+12-9
9m=45
m=5

Therefore the answer is C. m=5

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