Question

Resolución de sistemas de 2 ecuaciones con dos incógnitas

Answer 1

4x+7y=-17
2x-3y=11

X=-17-7y/4
X=11+3y/2

2(-17-7y)=4(11+3y)
-34-14y=44+12y
-14y-12y=44+34
-26y=78
Y=78/-26
Y=-3

2x-3y=11
2x=11+3•(-3)
2x=11-9
2x=2
X=2/2
X=1

———————
5x-2y=8
-3x+7y=1

X=8+2y/5
X=1-7y/-3

-3(8+2y)=5(1-7y)
-24-6y=5-35y
-6y+35y=5+24
29y=29
Y=29/29
Y=1

5x-2y=8
5x=8+2•1
5x=8+2
5x=10
X=10/5
X=2