-6y+3 = -7y+8 -6y+7y = 8-3 y = 5
35
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
5x - 7y = 5 (subtract both sides by 5x) -7y = -5x + 5 (divide both sides by -7) y = (5x - 5)/7 If you want to solve for y = 0, then x = 1.
15x+7y = 4 5x+7y = 2 Subtract the bottom equation from the top equation to eliminate y which will leave you with: 10x = 2 Divide both sides by 10 to find the value of x: x = 2/10 = 1/5 in its lowest terms. Substitute the value of x into the original equations to find the value of y: Therefore: x = 1/5 and y = 1/7
Oh, dude, 7y in math is just like saying "7 times y." It's like when you have 7 slices of pizza and y represents how hungry you are. So, if y is 2, you'd need 14 slices to satisfy your hunger. Math can be deliciously confusing, right?
-56xy: it means -1 times 8 times x times 7 times y
y=-9 7y-2=14y+61 7y-2-7y=14y+61-7y -2=7y+61 -2-61=7y+61-61 -63=7y -63/7=7y/7 -9=y
If you mean: (2x-7y)(x+y) then it is 2x squared -5xy -7y squared
y^2 + 7y + 12 = (y+4)(y+3)
x + 7y = 7 ⇒ 7y = -x + 7 ⇒ y = -x/7 + 1 ⇒ y intercept is 1.
y2+7y=18 y2+7y-18=0 (y+9)(y-2)=0 y=-9 & y=2
7y + 18 = 39 Therefore, 7y = 39 - 18 = 21 y = 21/7 y = 3
It is simply: 7y whereas y is the unknown variable
x = 7y x/7 = y
simplify the expression 16+7y-8 rewrite as 7(y-8)7•y= 7y 7•8= 56 7y-56 = -49y answer= 16+ (-49y)
5x = 7y , we divide both side by 'y' 5x/y = 7y/y (y will now be deducted) 5x/y = 7 x/y = 7/5 Therefore, x:y = 7:5