3 years ago

3(0.7z+2.8)=7(1.5z+7.2)

Mathematics

1 answer:

AnnZ [28]3 years ago

7 0

Answer:

z = -5

Step-by-step explanation:

3(0.7z + 2.8) = 7(1.5z + 7.2)

2.1z + 8.4 = 10.5z + 50.4

2.1z - 10.5z = 50.4 - 8.4

-8.4z = 42

z = 42/(-8.4)

z = -5

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