Question

Make x the subject of each formula.

i 3x + 2r = 2x + r
ii 5x + 3c = 9c − 4x
iii x2 = r

Answer 1

i. x = -r

ii. x = 2/3

iii. x = \sqrt{r \\ }

Explanation:

i. 3x + 2r = 2x + r

x + 2r = r

x = -r

ii. 5x + 3c = 9c - 4x

9x = 6c (÷9)

x = 6/9 (simplify)

= 2/3

iii. x² = r

x = \sqrt{r \\ }