Answer: 25 hours
Step-by-step explanation:
Let r = rate, t = time
From 1st sentence,
5r x 12 = 3
60r = 3
r = 3/60 = 1/20
From the next,
4r x t = 5
4 x 1/20 x t = 5
4/20t = 5 = 25
4(x+8)-4=34-2x steps
4x + 32 - 4 = 34 - 2x
4x + 28 = 34 - 2x
4 x + 2 x = 34 - 28
6 x = 6
x = 6/6
x = 1
3(-4x+5)=12 (Divide by 3 on both sides)
-4x+5=4 (Add -5 to both sides)
-4x=-1 (Divide by -4 on both sides)
x=1/4
Check:
3(-4(1/4)+5)=12
3(-1+5)=12
3(4)=12
So, your final answer is x=1/4
For this case we have the following expression:
We must clear the value of x in the expression.
For this, we must follow the following steps:
1) add by on both sides of the equation:
2) multiply both sides by 1 / a:
3) Common factor 1 / a:
Answer: