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3x + 3 = 2x + 8
3x - 2x = 8 - 3
x = 5
i) 8 - 2(3-4y) = 7y - 1
8 - 6 + 8y = 7y - 1
8y - 7y = -2 - 1
y = -3
j) 5x + 7(3x + 2) = 6(4x + 1)
5x + 21x + 14 = 24x + 6
26x + 14 = 24x + 6
26x - 24x = 6 - 14
2x = - 8
x = -4