Question

Solve and check the following equation:
3x + 15 = 2 - x

Answer 1

Answer:

3x+15= 2-x

3x+x= 2-15

4x= -13

x= -13/4

Answer 2

Answer:

x =    $\frac{-13}{4}$

Step-by-step explanation:

3x + 15 = 2 - x

⇒ 3x + 15 + x = 2

⇒ 4x +15 = 2

⇒ 4x = 2 - 15

⇒ 4x = -13

⇒ x = $\frac{-13}{4}$

Now by substituting    $\frac{-13}{4}$ in the equation

3 x $\frac{-13}{4}$  + 15 = 2 - $\frac{-13}{4}$

⇒ $\frac{-39}{4}$ + 15 = 2 - $\frac{-13}{4}$

⇒  $\frac{-39}{4}$  + $\frac{60}{4}$ = $\frac{8}{4}$ -  $\frac{-13}{4}$

⇒  $\frac{21}{4}$ =  $\frac{21}{4}$

∴ LHS = RHS