Answer:
x=13.6
Step-by-step explanation:
First, let's distribute.
7x-21=4x+20
Second, let's subtract 4x from both sides.
3x-21=20
Next, let's add 21 to both sides.
3x=41
Lastly, let's divide 3 from both sides.
x=13.66666667
x=13.6
Answer:
2.8 x 10^-3
Step-by-step explanation:
Answer:
1.b
2.d
Step-by-step explanation:
1.6(3x + 5) = 18x + 30 = 15x + 30 + 3x.
SO, the ? is equal to 30.
2. d
Answer:
6.4
Step-by-step explanation: