3) 85 + x = 125
x = 125 - 85
x = 40
4) 88 + 4x + 8 + 5x + 3 = 180
add like terms
9x + 99 = 180
9x = 180 - 99
9x = 81
x = 9
m<A =
5x + 3 =
5(9) + 3 =
45 + 3 = 48
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