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OleMash [197]
3 years ago
5

-2.3x + 4.2x = 15.01 Solve for x

Mathematics
2 answers:
Neko [114]3 years ago
6 0

-2.3x + 4.2x = 15.01         original equation

1.9x = 15.01                    combine like terms

1.9x/1.9 = 15.01/1.9        divide both sides by 1.9 to get x alone

<u>x = 7.9</u>                           simplify

CHECK YOUR WORK:

<u>plug in the solution to x into the original equation like so:</u>

-2.3(7.9) + 4.2(7.9) = 15.01        original equation w/ substitute for x

-18.17 + 33.18 = 15.01                simplify multiplication

<u>15.01 = 15.01</u>                             simplify addition

<u>When you get an answer like this, you know that the solution to x that you found is correct.</u>

VashaNatasha [74]3 years ago
4 0

Answer:

x = 7.9

Step-by-step explanation:

-2.3x + 4.2x = 15.01

combine like terms

1.9x = 15.01

divide both sides by 1.9

x = 7.9

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