Question

if 2x + 7|4 = x|4 + 5 then value of x is​

Answer 1

Answer:

x = 4.

Step-by-step explanation:

2x + 7|4 = x|4 + 5

Okay so we are trying to balance this, numbers on one side, letters on the other side.

2x + 28 = 9x

We don't want the 2x on the left, do we?

(2x + 28) + (-2x) = 9x + (-2x)

What you do to one side, you have to repeat to the other side. You can see (-2x) was added.

2x + 28 - 2x = 9x - 2x

Now we need to turn both the (-2x) into nought by using our friend +2x.

2x - 2x + 28 = 7x

Both 2x cancel each other out, therefore we don't write the nought.

28 = 7x

Now we need to find x.

We know that 28/7 = 4

x = 4

Answer 2

Answer:

$2x + 7 \div 4 = x \div 4 + 5 \\2x - x \div 4 = 5 - 7 \div 4 \\ 7x \div 4 = 13 \div 4 \\ 7x = 13 \\ x = 13 \div 7$