How do you solve 4x=-16?

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

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Answer 1 · 2018-04-26T18:45:57

#x=-4#

#"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"#

Answer 2 · 2018-04-26T18:46:01

#x=-4#

#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.