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olya-2409 [2.1K]

3 years ago

13

Find x in ecuation 4x+30=40

2 answers:

aliya0001 [1]3 years ago

8 0

2.5

4x+30=40

-30 -30

4x=10

/4 /4

x=2.5

MaRussiya [10]3 years ago

3 0

4x+30=40

What you would do is subtract 30 from 30 and 40 which would give you 10 and then what you would do is divide the 10 by 4 to get 2.5. Therefore X=2.5. And to check your work you would plug in 2.5 in place of X and the answer to that equation should be 10.

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