Answer: d = 147/4 or 36.75
Edward didn't isolate for 'd' by rearranging the terms.
(4/7)d = 21 (Multiply both sides by 7 to get rid of the 7 on the left side)
4d = 21 · 7
4d = 147 (Divide both sides by 4 to isolate for d)
d = 147/4 or 36.75
Answer:
1. 5%
2. 6%
3. $600
Step-by-step explanation:
10+5=5+10
They both ate the same amount of food.
Commutative Property of Addition is used.
So, there are two equations.
5a + 3c = 30
a + c = 8, therefore, a = 8 - c
5a + 3c = 30
5(8 - c) + 3c = 30
40 - 5c + 3c = 30
-2c = -10
c = 5 , So a = 3
-4x-2y=-12
4x+8y=-24
--------------------------add
6y = -36
y = -6
Substitute y = -6 into -4x-2y=-12
-4x-2(-6) = -12
-4x + 12 = -12
-4x = -24
x = 6
Answer
x = 6 and y = -6
