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a. x – 7 +7 = 5 +7
x = 12
b. y +5 -5= 8-5
y = 3
c. 3x + 9 = 18
3x + 9- 9 = 18- 9
3x = 9
X = 3
joseph rimiru answered the question on September 28, 2017 at 11:16
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