2x - 2y = -38 ....multiply by -2
-5x - 4y = 23
---------------
-4x + 4y = 76 (result of multiplying by -2)
-5x - 4y = 23
---------------add
-9x = 99
x = -99/9
x = -11
2x - 2y = -38
2(-11) - 2y = -38
-22 - 2y = -38
-2y = -38 + 22
-2y = - 16
y = -16/-2
y = 8
solution is (-11,8)
If plus or minus the bottom of line must be the same number
but if devide or multiplication the bottom of line no need to be same number
Answer: 5
Step-by-step explanation:
J, K, and L are collinear
J is between K and L
LK = KJ + LJ
LK = 9x + 7
KJ = 2x - 3
LJ = 4x - 8
9x + 7 = (2x - 3) + (4x - 8)
9x + 7 = (2x + 4x) + (-3 - 8)
9x + 7 = 6x + -11
9x + 7 = 6x - 11
9x + 7 - 7 = 6x - 11 - 7
9x = 6x - 18
9x - 6x = 6x - 6x - 18
3x = -18
x = -6
∴ The value of x is -6
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