The simplified answer is 3x–3
Answer:
x - 6y + 10z
Step-by-step explanation:
7x + 3y - 5z - (8x - 3y + 5z)
= 7x + 3y - 5z - 8x + 3y - 5z
= 7x - 8x + 3y + 3y - 5z - 5z
= - x + 6y - 10z
OR
= -(- x + 6y - 10z)
= x - 6y + 10z
Answer:
x = 5
Step-by-step explanation:
Given
9x - 3 - 8x = 7 - x , that is
x - 3 = 7 - x ( add x to both sides )
2x - 3 = 7 ( add 3 to both sides )
2x = 10 ( divide both sides by 2 )
x = 5
Answer:
(-1, 3)
Step-by-step explanation:
to solve using substitution, you have to know the value of either x or y. in this example, they gave you the value of y already: y=x+4.
this means you can substitute the y for (x+4). if we substitute y for (x+4) in the equation y=-5x-2, we get this:
(x+4)=-5x-2
then solve for x
6x=-6
so x=-1
since we know the x value, we can solve for y
y=x+4
y=-1+4
y=3
so the final answer is (-1, 3)
Answer:
The second one is correct
