1. 180 = 150 + 3z
180 - 150 = 3z
30 = 3z
z = 30/3
z = 10'
2. 180 = 4d + 2d
180 = 6d
d = 180/6
d = 30'
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1. 180 = 150 + 3z
180 - 150 = 3z
30 = 3z
z = 30/3
z = 10'
2. 180 = 4d + 2d
180 = 6d
d = 180/6
d = 30'
3x=180-150
3x=30
x =10
4d +2d=180
6d=180
d=30