If x=1 y= -1, a= -2, b=3, then value of ax+by is

- 5

Step-by-step explanation:

Substitute the given values into the expression

ax + by

= (- 2 × 1) + (3 × - 1)

= - 2 + (- 3)

= - 2 - 3

= - 5

-5

Step-by-step explanation:

ax= -2(1)= -2

by= 3(-1)= -3

ax+by=-2+-3=-5

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.