Help me please i am stuck and dont know how to do this

Mathematics

2 answers:

Anna11 [10]3 years ago

8 0

Equations given:
10x+4y=12
x-4y=10

Step 1: Cancel out the y to find x (because one is positive 4y and one is negative 4y, they cancel each other out)

10x+4y=12
x-4y=10
11x=22
x=2

Step 2: Plug x back into one of the equations (I chose the second one b/c it was easier but it doesn't matter. You should get the same answer either way)

x-4y=10
2-4y=10
-4y=8
y=-2

Optional step: if you plug the answers back into the equations, you should get the right answers.

mars1129 [50]3 years ago

5 0

X= 10 + 4y

I think anyways

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What step do I do next ?

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notice, the 2.135 has three decimals, namely three numbers to the right of the decimal point.

since 2.135 has three decimals, then what we do, we add three zeros to 5, AND do away with the decimal point, thus our division is really

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now, if we had 2.135 ÷ 5.79

what we do is, since 2.135 has three decimals, we add three zeros to 5.79, and since 5.79 has two decimals, we add two zeros to 2.135, then our division is really

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anyhow, that said, check the picture below