Answer:
x = -5
Step-by-step explanation:
move the variable tothe left hand side change the sign
-x-7= -2
Calculate the sum
-x =5
change the sign on both of the equations
x =
Answer:
3x + 2y = 315 -----(1)
2x + 4y = 450 -----(2)
from (1) 3x + 2y = 315
2y = 315-3x
y = 157.5 - 3/2x ---- (3)
substitute (3) into (2)
2x + 4y = 450
2x + 4(157.5 - 3/2x ) = 450
2x + 630 - 6x = 450
-4x = -180
x = 45 ---- (4)
substitute (4) into (3)
y = 157.5 - 3/2x
y = 157.5 - 3/2(45)
y = 90
a haircut,x = 45 minutes
dye hair,y = 90 minutes
Answer:
b= -x+ y/17
Step-by-step explanation:
1. Subtract 17x from both sides of the equation in order to isolate b on one side.
y -17x= 17b
2. Divide every term by 17 in order to isolate b from any coefficients.
y/17 -17x/17 = 17b/17
3. Simplify
b= -x+y/17
I believe it’s A
Sorry if I get it wrong :/
