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180=5x+40
180-40=5x
140:5=x
28=x
x=28
(Soory cuma tahu x nya aja)
3x + 40 + 2x = 180 "
5x = 180" - 40"
x = 140" : 5
x = 28 "
c = 2x = 2 x 28 = 56"
a = 3x = 3 x 28 = 84"