How do you solve 4x=-16?

i need help on how solve this using algebra
i am in grade 8

2 Answers
Apr 26, 2018

x=-4

Explanation:

"to isolate x divide both sides by "4

(cancel(4) x)/cancel(4)=(-16)/4

rArrx=-4

color(blue)"As a check"

4x=4xx(-4)=-16larr" True"

Apr 26, 2018

x=-4

Explanation:

4x simply means 4 multiplied by our unknown value.

We can reverse a multiply by doing the opposite, which is dividing.

Remember what we do to one side, we do to the other.

4x=-16

-> x=-16/4=-4

We can always check using the original statement using the value we just obtained.

-4 xx 4=-16 so we are correct.