7 x + 9 y is = 12 and 9 X + 7 Y is= 22 them find X + Y
Answers
Answered by
1
Step-by-step explanation:
7x+9y=12 ...........(1)
2 9x+7y=22 ...........(2)
Add equations (1) and (2),7x+9y+9x+7y=12+22
2+2216x+16y=34
16(x+y)=34
x+y=34/16
= 17/8
Answered by
1
Answer:
17/8 or 2.125
Step-by-step explanation:
Add the equation ...................................1 and 2
7x+9y+9x+7y= 22+12
16x + 16y =34
16(x+y)=34
x+y=34/16=17/8 or 2.125
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