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x= 5+4
x= 9
x = 5 + 4
x = 9
.d) 3x + 7 = 28
3x = 28 - 7
3x = 21
x = 21/7
x = 3
e) x - 5 = 1
x = 1 + 5
x = 6
f) 3x - 9 = 3
3x = 3 + 9
3x = 12
x = 12/3
x = 4
g) 2x - 2 = 42x = 4 + 2
2x = 6
x = 3