Question

0.3 +0.7x = 0.85x and check your result​

Answer 1

$\huge\tt\colorbox{yellow}{Answer}$

$0.3 + 0.7x = 0.85x \\ 0.3 = 0.85x - 0.7x \\ 0.3 = 0.15x \\ x = \frac{0.3}{0.15} \\ x = 2$