Question

What is the value of the x variable in the solution to the following system of equations?
2x + 3y = 4
x - 2y = -5

2

-2

1

-1

Answer 1

do you know how to do substitution???

Answer 2

i spelled that wrong:D

Answer 3

no all I know is ellimination

Answer 4

oh thats fine i know that way too:)

Answer 5

you think you could help me(:

Answer 6

yup!

Answer 7

ummmm i think what you have to do is plug like each one in for y and solve for x...i think
:D

Answer 8

@jdoe0001

Answer 9

he can help hopefully:)

Answer 10

okay thank you :)

Answer 11

np :D

Answer 12

@jaderbrown?

Answer 13

$$
2x + 3y = 4\\
x - 2\color{red}{y} = -5 \\
\text{solve the 2nd for "y"}\\
y=\color{red}{\frac{x+5}{2}}\\
\text{now that we know what "y" equals to}\\
\text{let us use that and substitute in the 1st one}\\
2x + 3y = 4\\
x - 2\pmatrix{\color{red}{\frac{x+5}{2}}} = -5 \\
\text{now just solve the 2nd one for "x"}
$$

Answer 14

Cool xD

Answer 15

wait, I substitute it to the wrong one :/

Answer 16

Hahaha :D

Answer 17

thanks!!!

Answer 18

$$
2x + 3y = 4\\
x - 2\color{red}{y} = -5 \\
\text{solve the 2nd for "y"}\\
y=\color{red}{\frac{x+5}{2}}\\
\text{now that we know what "y" equals to}\\
\text{let us use that and substitute in the 1st one}\\
2x + 3\pmatrix{\color{red}{\frac{x+5}{2}}} = 4\\
x - 2y = -5\\
\text{now just solve the 2nd one for "x"}
$$

Answer 19

there

Answer 20

eliminate y for either equation

Answer 21

sorry I went to the store, so I got x=2y-5