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2(a+3) = 12
a+3 = 12:2
a+3 = 6
a = 6-3
a = 3
Bagian b.
5(2r-3) = 5
2r-3 = 5:5
2r-3 = 1
2r = 1+3
2r = 4
r = 4:2
r = 2
Bagian c.
3(p+6) = 2(p-3)
3p + 18 = 2p - 6
3p - 2p = -6 - 18
p = -24
Bagian d.
6(2-x) = 12
2 - x = 12:6
2 - x = 2
x = 2-2
x = 0
2a = 6
a = 3
B. 10r - 15 = 5
10r = 20
r = 2
C. 3p + 18 = 2p - 6
3p - 2p = -18 - 6
p = - 24
D. 12 - 6x = 12
-6x = 0
x = 0