Question

In the equation, what is the value of x?

-4(x + 4x) = 2(2 - x) + 10

A) -7/9
B) -9/7
C) 7/9
D) 9/7

Answer 1

a) -7/9

Explanation:

Now we have to,

→ Find the required value of x.

The equation is,

→ -4(x + 4x) = 2(2 - x) + 10

Then the value of x will be,

→ -4(x + 4x) = 2(2 - x) + 10

→ -4(5x) = 2(2) - 2(x) + 10

→ -20x = 4 - 2x + 10

→ -20x = -2x + (4 + 10)

→ -20x = -2x + 14

→ -20x + 2x = 14

→ -18x = 14

→ x = 14/(-18)

→ x = -14/18

→ [ x = -7/9 ]

Hence, option (a) is correct.

Answer 2

A) -7/9

Explanation:

-4(x + 4x) = 2(2 - x) + 10

-4x - 16x = 4 - 2x + 10

-4x - 16x + 2x - 4 - 14 = 0

-18x -14 = 0

-18x = 14

x = - 14/18

x = - 7/9