Question

a)$3+x=0$

b)$23x+2=2$

c)$5x-3x=30$

d)$12-7+4x=25$

e)$4x+10=45-3x$

f)$5.(9+y)=20 -3+6y$

Answer 1

a)

$3 + x = 0$

$x = - 3$

b)

$23x + 2 = 2$

$23x = 2 - 2$

$23x = 0$

$x = 0$

c)

$5x - 3x = 30$

$2x = 30$

$x = \frac{30}{2}$

$x = 15$

d)

$12 - 7 + 4x = 25$

$5 + 4x = 25$

$4x = 25 - 5$

$4x = 20$

$x = \frac{20}{4}$

$x = 5$

e)

$4x + 10 = 45 - 3x$

$4x + 3x = 45 - 10$

$7x = 35$

$x = \frac{35}{7}$

$x = 5$

f)

$5( 9 + y) = 20 - 3 + 6y$

$45 + 5y = 17 + 6y$

$45 - 17 = 6y - 5y$

$28 = y$