a) x+9=13
x = 13-9
x = 4
b) x-23=49
x = 49+23
x = 72
c) 25-40=x-7
x-7 = 25-40
x = 25-40+7
x = -8
d) x+ 29=-37
x = -37-29
x = -66
e) x-58=42
x = 42+58
x = 100
f) x-19=-101
x = -101+19
x = -82
15/06/23
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Verified answer
a) x+9=13
x = 13-9
x = 4
b) x-23=49
x = 49+23
x = 72
c) 25-40=x-7
x-7 = 25-40
x = 25-40+7
x = -8
d) x+ 29=-37
x = -37-29
x = -66
e) x-58=42
x = 42+58
x = 100
f) x-19=-101
x = -101+19
x = -82
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15/06/23