if y=7x
2006-10-30 02:33:46 · 14 answers · asked by Amanda Fay! 3 in Science & Mathematics ➔ Mathematics
If y = 7x
then putting value of y in the equation
-4y + x = -27
-4(7x) + x = -27
-28y + x = -27
-27x = -27
Divide both sides by -27
x = 1
And as y = 7x
y = 7(1)
y = 7
Answer
x = 1
y = 7
2006-10-30 02:44:35 · answer #1 · answered by Anonymous · 0⤊ 0⤋
x=1
2006-10-30 02:36:45 · answer #2 · answered by big_j_gizzy 4 · 0⤊ 0⤋
Well, you take the equation -4y + x = -27 and for every Y, you put 7x
so, -4(7x) + x = -27
-28x + x = -27
-27x = -27
x = 1
2006-10-30 02:36:35 · answer #3 · answered by Clayton A 2 · 0⤊ 0⤋
y=7 and x=1
2006-10-30 02:44:20 · answer #4 · answered by Anonymous · 0⤊ 0⤋
-4y+x=-27
Just plug 7x in for y.
-4(7x)+x= -27
-28x + x + -27
-27x = -27
x = 1
y=7
2006-10-30 04:43:09 · answer #5 · answered by Rachel M 2 · 0⤊ 0⤋
-4y +x = -27
Multiply by (-1) & put the value of (y) which is (7x)
4(7x) –x = 27
28x –x = 27
27x = 27
Divided by (27)
x = 1
so,
y = 7
2006-10-30 03:51:24 · answer #6 · answered by Fizz 2 · 0⤊ 0⤋
-4(7x) + x = -27
-28x +x = -27
hence x=1
2006-10-30 02:38:47 · answer #7 · answered by Babygirl 3 · 0⤊ 0⤋
-4y+x=-27
y=7x
then -4(7x)+x=-27 or
-28x+x=-27 or -27x=-27 or x=1
2006-10-30 02:44:18 · answer #8 · answered by MY Regards to All 4 · 0⤊ 0⤋
-4(7x)+x=-27 (sub y=7x)
-27x=-27 (divide by -27)
x=1
2006-10-30 02:36:46 · answer #9 · answered by raj 7 · 0⤊ 0⤋
y=7x, so, back into original equation,
-4(7x) + x = -27, so,
-28x + x = -27
-27x = -27
x=-27/27 = -1
also, y=7x = -7
so, x= -1, y= -7
2006-10-30 02:37:54 · answer #10 · answered by tsunamijon 4 · 0⤊ 1⤋