y - 3 = 0 y = 3
y=4x-8y=2x+10Substitute (4x-8) for y in the second equation and solve for x:4x-8=2x+102x=18x=9Now solve for y:y=4(9)-8=28(9,28)
√(2y) + 3 = 11 √(2y) = 11 - 3 = 8 √2 x √y = 8 √y = 8/√2 y = (8/√2)2 = 64/2 = 32
16
8
y - 3 = 0 y = 3
3y + 8 = 3 -8 -8 3y=-5 (3y)/3=-5/3 y=(-5/3)
8
y=4x-8y=2x+10Substitute (4x-8) for y in the second equation and solve for x:4x-8=2x+102x=18x=9Now solve for y:y=4(9)-8=28(9,28)
√(2y) + 3 = 11 √(2y) = 11 - 3 = 8 √2 x √y = 8 √y = 8/√2 y = (8/√2)2 = 64/2 = 32
16
y/x is a constant; so first of you can solve for this constant. y/x=6/-3, or y/x=-2 y/4=-2 y=-8
Add the two equations: 3x = 15 Divide by 3: x = 5, making y = -3. Job done.
8
x=4 y=x+3 y=4+3 y=7
-3
7x + y = 8 Subtract 7x from each side of the equation: y = -7x + 8