Answer:
(x, y)=(4,-8)
Step-by-step explanation:
9x+y=28
3x+3y=-12 /:(-3)
9x+y=28.......(1)
-x-y=4......(2)
9x+y=28
(1)+(2): 8x=32
9x+y=28
x=32/8
9x+y=28
x=4
9*4+y=28
x=4
36+y=28
x=4
y=28-36
x=4
y=-8
x=4
(x, y) =(4,-8)
Answer:
is no
Step-by-step explanation:
Because your question isn't specific or formatted exactly, I cannot guarantee that my answer is what you expect.
√2x - 1 + 2 = 5
√(2x + 1)² = 5²
2x + 1 = 25
2x = 24
/2 /2
x = 12
Therefore x = 12.
Proof:
√2x - 1 + 2 = 5
√2(12) - 1 + 2 = 5
√24 - 1 + 2 = 5
√25 = 5
5 = 5
Answer:
4
Step-by-step explanation: