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garri49 [273]
3 years ago
5

How to do substitution

Mathematics
1 answer:
Brut [27]3 years ago
5 0
You solve for one variable like 
y-5x=2
"y=5x+2"

9x+3y=58
and you plug it in into the other equation
9x+3(5x+2)=58

You solve for x and then plug in your answer for x into the other equation
*let's imagine x=8*
then:
y-5(8)=2
and solve for y 
:D 


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you pay 3.3 cents per minute for long-distance phone calls on your phone. your phone bill is $3.40 write and solve an equation t
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If you would like to know the number of minutes of long-distance calls you made, you can calculate this using the following steps:

3.3 cents = $0.033
m = $3.40 / 3.3 cents
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m = 103.03 minutes 

The correct result would be <span>103.03 minutes.</span>
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the nutritional chart on the side of a box of cereal states that there are 93 calories in a 3/4 cup serving how many calories ar
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3 years ago
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Please help :) If you know anything about combining equations can you help me :)
julsineya [31]

Answer:

-5x - 8y = -5

Step-by-step explanation:

Whenever we two equations, we are essentially just adding the left sides up and then the right sides up. Here, let's write these into one whole big equation:

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Taking the parentheses out, we have:

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Combine like terms:

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Hope this helps!

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