Asked by Jackie
solve by elimination
2r-5s =-22
5r+2s = 32
2r-5s =-22
5r+2s = 32
Answers
Answered by
Henry
2r - 5s = -22
5r + 2s = 32
Multiply 1st Eq by 5 and 2nd Eq by -2.
10r - 25s = -160
-10r -4s = -64
Add the 2 Eq
-29s = -174
5 = 6
Substitute 6 for s in original Eq
and solve rfor r.
2r - 5*6 = -22
2r = -22 + 30 = 8
r = 4.
5r + 2s = 32
Multiply 1st Eq by 5 and 2nd Eq by -2.
10r - 25s = -160
-10r -4s = -64
Add the 2 Eq
-29s = -174
5 = 6
Substitute 6 for s in original Eq
and solve rfor r.
2r - 5*6 = -22
2r = -22 + 30 = 8
r = 4.
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