9x - 6/5 = -12
Convert -12 to -60/5
9x - 6/5 = -60/5
Add 6/5 to both sides
9x - 6/5 + 6/5 = -60/5 + 6/5
9x = -54/5
divide both sides by 9
x = -6/5
Answer:
78 boys
Step-by-step explanation:
If the raio is 2:3 that means there are 5 equal parts
56/2 28
3 x 28 = 78
Answer:
wish i could help
Step-by-step explanation:
Answer:
$37.71
Step-by-step explanation:
125.70/10 = 12.57
12.57 * 3 = 37.71
The given equations are
5x + 7y = 7
3x - 2y = 9
As a matrix equation,
A = [5 7
3 -2]
X = [x
y]
C = [7
9]
That is
a =5, c=7; and b=3, d=-2
a - b + c + d = 5 - 3 + 7 + (-2) = 7
Answer: 7
