Question

3x-y=20

x=7-y

Solve for x and y.

Answer 1

ill help :)

Answer 2

\[3x-y=20\]+ \[x+y=7\]
\[4x=27 \implies \dots\]

Answer 3

Find \(x\) from this last equation, and then substitute back to find y.

Answer 4

its really simple, all u gotta do is solve the equations throught the similultaneous method.

there are 2 ways,
1. Substitution
2. Elimination

Answer 5

They're both separate. It's not adding or subtracting them together...

Answer 6

y=1/4;x=81/4