Question

a)3у-5(x+1) x=-5, y=-1 . б)5x-3(y-2) x=-2 y=-1 . в) y+3*(4x-3) x=-2 y=-3

Answer 1

А)17 б)-2 в)-36
Решение на фото

Answer 2

To evaluate the given expressions, simply substitute the provided values of x and y into the expressions and perform the calculations. Let's go through each expression one by one:

a) 3y - 5(x + 1) when x = -5 and y = -1

Substitute the values of x and y: 3(-1) - 5(-5 + 1)

Perform the calculations: -3 - 5(-4)

Now, multiply and subtract: -3 + 20

Finally, solve the expression: 17

So, the result is 17.

b) 5x - 3(y - 2) when x = -2 and y = -1

Substitute the values of x and y: 5(-2) - 3(-1 - 2)

Perform the calculations: -10 - 3(-3)

Now, multiply and subtract: -10 + 9

Finally, solve the expression: -1

So, the result is -1.

c) y + 3(4x - 3) when x = -2 and y = -3

Substitute the values of x and y: -3 + 3(4(-2) - 3)

Perform the calculations: -3 + 3(-8 - 3)

Now, multiply and subtract: -3 + 3(-11)

Finally, solve the expression: -3 - 33

So, the result is -36.

To summarize: a) 3y - 5(x + 1) when x = -5 and y = -1 evaluates to 17. b) 5x - 3(y - 2) when x = -2 and y = -1 evaluates to -1. c) y + 3(4x - 3) when x = -2 and y = -3 evaluates to -36.