-4x - 1 = -7
add 1 to both sides to get...
-4x = -6
divide both sides by -4 to get
x = 1.5
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4x - 7 = 1 Therefore, 4x = 8 x = 8/4 x = 2
sqrt(4x+7) -4 = sqrt(4x-1) squared : (sqrt(4x+7) -4)2 = 4x-1 (4x+7) - 2x4xsqrt(4x+7) +16 = 4x-1 -8xsqrt(4x+7) = -24 sqrt(4x+7) = -24/-8 = 3 squared : 4x+7 = 32 = 9 4x = 9-7 = 2 then x=1/2
4x-1 = 6x-15 4x-6x = 1-15 -2x = -14 x = 7
(2, 7)
4x-5=7 4x=12 x=3