1
(x,7x)
134
X=-3/7
7x+3y where x=2 and y=9 can be written as (7*2)+(3*9) which can be simplified to (14)+(27), from there it's basic addition.
1
If x=2, then 7x = 14 and if y=5 then 4y=20.
(x,7x)
x=-1.5
7x + y + z = 6 7x + y + 4z = 9 y + x = 6 Take the first two statements and subtract them. 7x + y + z = 6 7x + y + 4z = 9 _____________ 0 + 0 - 3z = -3 Therefore: z = 1 Then you are left with: 7x + y + 1 = 6 7x + y + 4 = 9 which is impossible, so this is an impossible equation.
134
X=-3/7
x = -3 y = -2
7x+3y where x=2 and y=9 can be written as (7*2)+(3*9) which can be simplified to (14)+(27), from there it's basic addition.
The y-intercept for the equation y=-7x+1 is (0,1). When x=0, y= -7*0+1 = 1
7x + y = 4y = 4 - 7x
7x + 5y 7(3) + 5(2) 21 + 10 = 31