Question

a)6x -180=3x+36
b)5y-40=4y-16
c)10z=40
d)-40+10t=9t​

Answer 1

a)

$6x-180=3x+36\\\\6x-180+180=3x+36+180\\\\6x=3x+216\\\\6x-3x=3x+216-3x\\\\3x=216\\\\\frac{3x}{3}=\frac{216}{3}\\\\x=72$

b)

$5y-40=4y-16\\\\5y-40+40=4y-16+40\\\\5y=4y+24\\\\5y-4y=4y+24-4y\\\\y=24$

c)

$10z=40\\\\\frac{10z}{10}=\frac{40}{10}\\\\z=4$

d)

$-40+10t=9t\\\\-40+10t+40=9t+40\\\\10t=9t+40\\\\10t-9t=9t+40-9t\\\\t=40$