Explain how you know the equation x + 1 = 4 is equivalent to the equation 4x + 8 = 20.

4-1=3

x=3

and

4x + 8 = 20

     -8     -8

4x       = 12

4             4

x          = 3

Step-by-step explanation:

both x values equal 3

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

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step-by-step explanation:

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