Answer:
c
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
Try taking everything besides the x away. So the opposite of positive 7 is negative seven on the opposite side. 21-7 is 14 and 2x=14 is all that remains. The opposite of 2 times x is 2 divided by x and since we want to keep the x we divide the 2 on the other side, 14/2 is 7. x=7 is what remains.
Answer:
no solution
Step-by-step explanation:
x+y = -2
y = x + 2
let's start by isolating the y in both equations so we can compare them
subtract both sides by x to get this for the first equation
y = -2 + x
y = x + 2
this means
-2 + x = x + 2
subtract x from both sides
-2 = 2
this is never possible, so there is no solution
Answer:
4
Step-by-step explanation:
An equilateral triangle has 3 equal sides.
So
4(x-1) = x +8
4x-4=x+8
3x=12
x=4
Same result obtained when comparing the other pairs of equations.