Question

Someone please answer
2.1 ( x + 5 ) = 7

Answer 1

When we solve the L.H.S
2.1x+10.5=7
2.1x=7-10.5
2.1x=-3.5
x=3.5/2.1
x=3.09(approx.)

Answer 2

Since we have the 2.1 next to the parenthesis, we need to first distribute.

2.1 * x & 2.1 * 5

2.1x + 10.5

Then we take that and add the equals seven to the problem to move onto the next step.

2.1x + 10.5 = 7

We must get the 2.1x alone, therefore subtracting the 10.5 as it will also be subtracted on the other side as well.

2.1x + 10.5 = 7
- 10.5 -10.5

2.1x = -3.5

To get the x alone, we must divide both sides by 2.1, therefore removing the 2.1 from the x.

2.1x = -3.5
/2.1 /2.1

x = 1.66666666667

Hope this helped!

- Kat