Question

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b)t+2x=3
2t+5x=4

e)3x+4y=-5
x-2y=5

f)x+3y=6
-4x+6y=-12

Answer 1

B)
t +2x=3(-2)
2t+5x=4

-2y-4x=-6
2y +5x=4
---------------
x=-2
t +2(-2)=3
t -4=3
t=4+3 =7

E)
3x+4y=-5
x-2y=5(2)

3x+4y=-5
2x-4y=10
-------------
5x=5
x=5/5 = 1

1-2y=10
-2y=10-1>9
y=9/2
y=4,5

F)
x+ 3y =6(4)
-4x+6y=-12

4x+12y=24
-4x+6y=12
---------------
18y=36
y=36/18
y=2

x+3(2)=6
x+6=6
x=6-6
x=0