Question

Solve by substitution:
5x+y=4
2x-3y=1.3

Answer 1

Step-by-step explanation:

$5x+y=4 \\ y = 4 - 5x ....1 \\ 2x - 3y = 1.3 \: \: ....2 \\ using \: equation 1\: in \: equation \: 2 \\ 2x - 3y = 1.3 \\ 2x - 3(4 - 5x) = 1.3 \\ 2x - 12 - 15x = 1.3 \\ 13x = 1.3 + 12 \\ x = \frac{13.3}{13} \\ put \: value \: of \: x \: in \: equation \: 1 \\ y = 4 - 5x \\ y = 4 - 5( \frac{13.3}{13} ) \\ y = 4 - \frac{66.5}{13} \\ y = \frac{52 - 66.5}{13} \\ y = \frac{ - 14.5}{13}$

Answer 2

Here is ans which i have solved on paper