Mathematics, 15.04.2020 23:36 vasqz283

X+2y=4 and -x+y=-7 using substitution method

Answers

Answer from: dancemjones7458

Step-by-step explanation:

hello :

x+2y=4 (*)

-x+y=-7(**)

by(*) : x = 4-2y

put this value in to (**) : -(4-2y)+y=-7

-4+2y+y = -7

3y = -3

y= -1

but : x=4-2y so : x=4-2(-1)=6

conclusion : one solution (6 , -1)

Answer from: Quest

Letter b sorry i’m i’m wrong xx

Answer from: Quest

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.

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X+2y=4 and -x+y=-7 using substitution method...