Solve and Check the Linear Equation $$0.24 ( 70 ) + 0.40 x = 0.30 ( 70 + x )$$

Multiple Choice

Solve and check the linear equation.
- $$0.24 ( 70 ) + 0.40 x = 0.30 ( 70 + x )$$

A) $\{ 40 \}$
B) $\{ 30 \}$
C) $\{ 50 \}$
D) $\{ 20 \}$