Y=3X - 7 and 4x -5y= -20

x = 5 and y = 8

Step-by-step explanation:

→ Subtitute the value of y to second equation :

4x - 5y = -20

4x - 5(3x - 7) = -20

4x - 15x + 35 = -20

-11x + 35 = -20

-11x = -20 - 35 → (multiplied by -1)

11x = 20 + 35

11x = 55

x = 5

→ Subtitute x to one of Equation :

For example i take from First Equation…

y = 3x - 7

y = 3(5) - 7

y = 15 - 7

y = 8

∴ So, the value of x = 5 with y = 8

2^y = ln 5, or   y(ln 2) = ln 5.   solving for y,   y = (ln 5) / (ln 2).   y=5

step-by-step explanation: