Question

x + 3y = 6
5x - 2y = 13

5x + 7y = -1
-3x + 4y = -24.

3x + 4y = 8
8x - 9y = -77
método igualación

Answer 1

X=6-3y
X=13+2y/5

5(6-3y)=13+2y
30-15y=13+2y
-15y-2y=13-30
-17y=-17
Y=-17/-17
Y=1

X=6-3y
X=6-3•1
X=6-3
X=3

—————-
X=-1-7y/5
X=-24-4y/-3

-3(-1-7y)=5(-24-4y)
3+21y=-120-20y
21y+20y=-120-3
41y=-123
Y=-123/41
Y=-3

X=-1-7y/5
X=-1-7(-3)/5
X=-1+21/5
X=20/5
X=4

——————
X=8-4y/3
X=-77+9y/8

8(8-4y)=3(-77+9y)
64-32y=-231+27y
-32y-27y=-231-64
-59y=-295
Y=-295/-59
Y=5

X=8-4y/3
X=8-4•5/3
X=8-20/3
X=-12/3
X=-4