Plz solve these questions
Answers
Answer:
Step-by-step explanation:
vi) 3x-4y=8...........(1)
4x+3y=-6............(2)
eliminate x: substitute y into (1):
(1)*4-(2)*3 3x-4(-2)=8
12x-16y=32 3x+8=8
-12x+9y=-18 3x=8-8
-25y=50 3x=0
-25 -25
y=-2 x=0
vii) 5x+3y=33................(1)
3x-7y=11..................(2)
eliminate y: substitute x into (1):
(1)*7 + (2)*3 5(6)+3y=33
21y+35x=231 30+3y=33
+ -21y+9x=33 3y=33-30
44x=264 3y=3
44 44 3 3
x=6 y=1
Answer:
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