8x-5y = -40 -5y = -8x-40 y = 1.6x+8 which is now in slope intercept form
8x+40
7. 8x-40=2x+2 4x-20=1x+1 3x-21=0 3x=21 therefore x=7
Let me assume that this equation is -2 -8x = 40 It's usually best to move all the purely numerical items to one side first. Let me move the -2. Then, to do this I add 2 to both sides. -2 - 8x +2 = -8x = 40 + 2 = 42 or -8x = 42 Now, to yield x 'by itself' let me divide both sides by -8. (-8x)/-8 = x = 42/(-8) = -21/4 or x = -21/4
4
8x + 8=40 8x=40-8 8x=32 x=32/8 x=4
8x-5y = -40 -5y = -8x-40 y = 1.6x+8 which is now in slope intercept form
x2 - 8x - 40 = 0 ∴ x2 - 8x = 40 ∴ x2 - 8x + 16 = 56 ∴ (x - 4)2 = 56 ∴ x - 4 = ± 561/2 ∴ x = 4 ± 561/2 ∴ x = 4 ± 2 × 141/2 ∴ x ≈ {11.4833, -3.4833}
8(30) - 40 = 240 - 40 = 200.
If x = 2 then 40-(8*2) = 24
8x+40
Assuming you mean:(4x+36)(8x-40) = 0 then you can use the property that a product can only be zero if one of its factors is zero. In other words, you can change this to: 4x + 36 = 0 OR 8x - 40 = 0 Solve each of the individual solutions; their solutions are also solutions to the original equation.
7. 8x-40=2x+2 4x-20=1x+1 3x-21=0 3x=21 therefore x=7
Since there is only an expression - not an equation - you can simplify it but there is nothing to work out or solve. -7 + 8x + 40 + 90 = 8x + 123
Let me assume that this equation is -2 -8x = 40 It's usually best to move all the purely numerical items to one side first. Let me move the -2. Then, to do this I add 2 to both sides. -2 - 8x +2 = -8x = 40 + 2 = 42 or -8x = 42 Now, to yield x 'by itself' let me divide both sides by -8. (-8x)/-8 = x = 42/(-8) = -21/4 or x = -21/4
4
Assuming you mean:(4x+36)(8x-40) = 0 then you can use the property that a product can only be zero if one of its factors is zero. In other words, you can change this to: 4x + 36 = 0 OR 8x - 40 = 0 Solve each of the individual solutions; their solutions are also solutions to the original equation.