48
27 + y = 42 - 4y so 5y = 15 making y = 3 and x = 6
T = 3x + 7y; x = 4; y = 6T = 3x + 7y (substitute 4 for x, and 6 for y)T = 3(4) + 7(6) = 12 + 42 = 54
7 is the y intercept
-6
48
Rewrite equation as: y2-y-42=0 So you need two numbers that: multiply to -42 and add to -1 Those two numbers are: -7 and 6 so to factor you get: (y-7)(y+6)=0 y=7 y=-6
If y=-42,theny = -42.QED? ? ?============Another answer:THERE it is ===> Y = -42
192-y equals 150 = 42
Given y = 2x + 4, plug in x = 42 and simplify: y = 2(42) + 4 y = 84 + 4 y = 88
-113
42
y2 -y -42 = (y+6)(y-7) when factored
8x-7y=42 24x+y=170 An easy way to begin is to solve for one variable in one of your two equations. I will use the second equation to solve for y: 24x+y=170 y=170-24x This solution for y will then be plugged into the first equation so the equation will be of one variable, and therefore solvable: 8x-7y=42 8x-7(170-24x)=42 8x-1190+168x=42 176x=1232 x=1232/176=7 x=7 The solution we made for y can now be used with the solved value of x to find y's numerical value. y=170-24x y=170-24(7) y=170-168 y=2 So, finally, we get that x=7 and y=2
If y equals 7, then y equals 7. This equation is already in final, solved state. Read it out loud and you will understand.
27 + y = 42 - 4y so 5y = 15 making y = 3 and x = 6
Y+7=9 equals 2+7=9.