ПОМОГИТЕ!!!!!!!! #2(2),#3(2),#4(2)

Question

ПОМОГИТЕ!!!!!!!!
#2(2),#3(2),#4(2)

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Answer 1

2(2)
(5x+6y=6
(7x+6y=18

(6y=6-5x
(7x=6y=18

7x+(6-5x)=18
3x=6
x=3

6y=6-15
6y=-9
y=-1.5


3(2)
(3x+2y=-5
(-5x-3y=9/x2

(2y=-5-3x
(-10x-6y=18

-10x-3*(-5-3x)=18
-10x+15+9x=18
x=3

2y=-5-9
2y=-14
y=-7

Comments

Прости 4(2) уже не помню как делать)