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Solve the following equations.
(a) 2 (x + 4) = 12 (b) 3 (n − 5) = 21
(c) 3 (n − 5) = − 21 (d) −4 (2 + x) = 8
(e) 4(2 − x) = 8
Asked by Suresh Last Modified
Answer (a) 2 (x + 4) = 12
Dividing both sides by 2,
x = 6 − 4 = 2 (Transposing 4 to R.H.S.)
(b) 3 (n − 5) = 21
Dividing both sides by 3,
n = 7 + 5 = 12 (Transposing −5 to R.H.S.)
(c) 3 (n − 5) = −21
Dividing both sides by 3,
n = − 7 + 5 = −2 (Transposing −5 to R.H.S.)
(d) −4 (2 + x) = 8
Dividing both sides by −4,
x = − 2 − 2 = −4 (Transposing 2 to R.H.S.)
(e) 4 (2 − x) = 8
Dividing both sides by 4,
2 − x = 2
−x = 2 − 2 (Transposing 2 to R.H.S.)
−x = 0
x = 0
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