beeboppity
contestada

30 points! I will give brainliest.


Consider the expression 6r – r + 8(15 – r) + 23 – 6 .


Part A Is –3r + 137 equivalent to the given expression? Write your answer in the space provided .

Respuesta :

starlipika

6r -4 +8(15-r) + 23

expand brackets

6r -4 +120 -8r + 23

collect like terms

120 + 23 - 4 = 139

6r - 8r = -2r

139 - 2r

139 - 2r = -3r + 137

-137 from both sides

-2r = -3r -2

add 3r

R = -2

sub in both equations and see if you get the same value

-3r + 137

-3 (-2) + 137

6 +137 = 143

139 - 2r

139 - 2(-2)

139 + 4

143

yes they are equal

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