D)9+6×=2
E)49-2×=-19
F)18×-39=9
G)59-2×=99
H)-3×+9=(49)2
I)-2-5×=9
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D)
9+6×=2
6x = 2-9
6x = -7
x = -7/6
E)
49 - 2× = - 19
49+19 = 2x
68 = 2x
2x = 68
x = 68/2
x = 34
F)
18× - 39 = 9
18x = 9 + 39
18x = 48 (:2)
9x = 24
x = 24/9
G)
59-2×=99
59-99 = 2x
- 40 = 2x
2x = - 40
x = - 40/2
x = - 20
H)
-3×+9=(49)+2
-3x = 51-9
-3x = 42 (-1)
3x = - 42
x = - 42/3
x = - 14
I)
-2-5×=9
- 2 - 9 = 5x
- 11 = 5x
5x = - 11
x = - 11/5
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