First we have to distribute the parentheses on the left side, 2*x is 2x and 2*-3 is -6, so now the equation is 4x+2x-6 = 8x+12
Then, we can add together the two x's on the left side,
so now we have 6x-6 = 8x+12 Subtract 12 from both sides and
you get 6x -18 = 8x Then you can subtract 6x from both the sides and get
-18 = 2x Now we can divide both sides by 2, and the final answer is -9 = x
Since they are not the same and the two sides aren't unequal, there is one solution(:
Hope this is helping you(:
Answer:
30 students in the class.
Step-by-step explanation:
There are several which in which we can approach this question:
We can do this question using direct proportion.
"If 18 girls represent 60%, how many students represent 100%?"
18
60
=
x
100
x
=
18
×
100
60
30
students altogether.
Answer:
its D
Step-by-step explanation:
x+2x=90-45
3x=45
Answer:
Step-by-step explanation:
To answer this question we must know either the length or the width.
The formula for the perimeter of a rectangle is P = 2L + 2W.
If the perimeter is 1500 ft (not ft²), then 1500 ft = 2L + 2W.
At this point we could solve for either L or W, but not both simultaneously.
If we decide to solve for W as a function of L, we get:
1500 ft = 2L + 2W => 750 ft = L + W => W = 750 ft - L
If we decide to solve for L as a function of W, we get L = 750 ft - W
The second one, ((6 x 5) x 4) +((5 x 4) x 2) = 160
the third one, ((7 x 6) x 4) + (6 x 4) x 2) = 216
the fourth one, ((8 x 4) x 4) + ((4 x 3) x 2) = 152