Question

for the simultaneous equations 4x+3y = 19 and 4x-3y = -11 ------ is the value of Dx. i​

Answer 1

Answer:

$4x + 3y = \: \: 19 \\ 4x - 3y = - 11 \\ - - - - - - - - \\ 8x = 8 \\ x = \frac{8}{8} \\ x = \underline{ \underline{ 1}} \\ \\ 4x + 3y = 19 \\ 4(1) + 3y = 19 \\ 4 + 3y = 19 \\ 3y = 19 - 4 \\ 3y = 15 \\ y = \frac{15}{3} \\ y = \underline{ \underline{5}}$