Question

(a) If 5z + 27 = 3z + 33, find the value of z
(b) If 7x + 14 = 34 - 3x, find the value of x [2 MARKS]

Answer 1

Solution: 1 Mark each

(a) $5z+27=3z+33$

$\Rightarrow 5z-3z=33-27$

$\Rightarrow 2z=6$

$\Rightarrow z=3$

$\therefore z=3.$


(b) $7x+14=34-3x$

$\Rightarrow 7x+14=34-3x$

$\Rightarrow 7x+3x=34-14$

$\Rightarrow 10x=20$

$\therefore x=\frac{20}{10}=2$