Answer:
1.
4k + 6(j - 2)
Substitute the values.
4(3) + 6 [(5) - 2]
12 + 6 (3)
12 + 18
= 30
2.
9(r - 5) = 4r - 5
9r - 45 = 4r - 5
9r - 4r - 45 = -5
5r - 45 = -5
5r = -5 + 45
5r = 40
r = 40 ÷ 5
r = 8
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