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.