Question

Solve these equations for x =

a. 2x - 4=11

b. 5x-11=3x+9

c. 9 – 2 (x - 5) = x + 10

Answer 1

Answer

a.7.5

b.10

c.-3.66

Explaination

a.

$2x - 4 = 11 \\ = 2x = 15 \\ = x = \frac{15}{2} = 7.5$

b.

$5x - 11 = 3x + 9 \\ = 5x - 3x = 9 + 11 \\ = 2x = 20 \\ = x = 10$

c.

$9 - 2(x - 5) = x + 10 \\ = 9 - 2x - 10 = x + 10 \\ = - 2x - 1 = x + 10 \\ = - 2x - x = 10 + 1 \\ = 3x = - 11 \\ = x = \frac{ - 11}{3} = - 3.66$

Answer 2

Answer:

a:- x = 11 + 4=15

x = 15/2 =7.5 Ans

b:- 5x - 3x = 11 + 9

2x = 20

x = 20/2

x = 10 Ans

c:- 9 - 2x +.10 =x + 10

9 + 10 -10 = 2x + x

19 -10 = 3x

9 = 3x

x = 9/3 =3 Ans