-54-(-25)=-54+25=-29
The answer is-29
12
For every 1girl there are 2boys
1girl+2boys= 3/1girl
(−12a^3b)(7ac+2b^2)
Step-by-step explanation:
(−24a^3(b^3)−84a^4bc
−84a^4bc−24a^3b^3=
(−12a^3b)(7ac+2b^2)
Answer:
Step-by-step explanation:
x-y=7
-3x+9y=-39
Divide the second equation by 3
-x +3y = -13
Add this to the first equation
x-y=7
-x +3y = -13
----------------------
0x +2y = -6
Divide by 2
2y/2 = -6/2
y = -3
Now find x
x-y = 7
x -(-3) = 7
x+3 = 7
Subtract 3 from each side
x = 4
(4,-3)
Or by substitution
x-y=7
solve for x
x = 7+y
-3x+9y=-39
Substitute y+7 in for x
-3(7+y) +9y = -39
Distribute
-21 -3y +9y = -39
Combine like terms
-21 +6y = -39
Add 21 to each side
6y = -18
19 = h/3 - 8
add 8 to each side
19+8 = h/3 -8 +8
27 = h/3
multiply by 3 on each side
27*3 = h/3 *3
81 = h