Question

Solve and check your answer.
(ii) 6x + 3 = 2x +12 (i) 3(x + 6) = 21
(iii) 4(3x - 3) -2(3x - 5) = 7
(iv) 9x - 2(x + 5) = 5(x + 6)
(iv)0.6x = 0.5x + 2.5
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Answer 1

Step-by-step explanation:

like wise you can solve all this questions

Answer 2

i) $3(x + 6) = 21$

$3x + 18 = 21$

$3x = 3$

$x = \frac{3}{3} = 1$

$l.h.s = 3(1 + 6) = 3 \times 7 = 21$

Hence,

$21 = 21$

LHS = RHS

ii) $6x + 3 = 2x + 12$

$6x - 2x = 12 - 3$

$4x = 9$

$x = \frac{9}{4}$

By applying the values of x in question

$6x + 3 = 6 \times \frac{9}{4} + 3$

$= \frac{27}{2} + 3 = \frac{27 + 6}{2} = \frac{33}{2}$

$= 16.2 = lhs$

$= > 2x + 12 = 2 \times \frac{9}{4} + 12$

$= \frac{9 + 24}{2} = \frac{33}{2}$

$= 16.5$

Hence,

LHS = RHS