3 years ago

S+2m=20 s-5=m substitution

Mathematics

1 answer:

xxTIMURxx [149]3 years ago

7 0

Answer:

s = 10

Step-by-step explanation:

s + 2(s - 5) = 20

s + 2s - 10 = 20

s + 2s - 10 + 10 = 20 + 10

s + 2s = 30

3s = 30

3s/3 = 30/3

s = 10

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