Answer:
No, it is not correct. You should divide by 21 and 3.
Explanation:
3x=21
x=7
Q 1)
3(x + 5) = 36
3x + 15 = 36
3x = 36 - 15
3x = 21
x = 21/3
x = 7
Verification:
3(7 + 5) = 36
3(12) = 36
36 = 36
Hence proved that x = 7
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