6. Find m2ABC.
(5x + 3)
(3x + 7)
E
B
21
37
10
53

Answer:
53
Step-by-step explanation:
(5x+3)+(3x+7)=90
5x+3+3x+7=90
5x+3x+3+7=90
8x+3+7=90
8x+10=90
8x=90-10
8x=80
x=80/8
x=10
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5x+3=5(10)+3=50+3=53