Question

20б-16а+120,если 4а-5б= -3/4

Answer 1

20б-16а+120=4(5б-4а)+120=-4(4а-5б)+120

подставляем 4а-5б

-4(-3/4)+120=4*(3/4)+120=3+120=123

Ответ:123

Answer 2

To solve the expression 20б - 16а + 120 given the equation 4а - 5б = -3/4, we need to find the values of а and б and then substitute them into the expression.

Let's solve the equation for а in terms of б: 4а - 5б = -3/4

First, isolate 4а: 4а = -3/4 + 5б

Now, divide both sides by 4 to solve for а: а = (-3/4 + 5б) / 4

Next, substitute this value of а into the expression 20б - 16а + 120: 20б - 16((-3/4 + 5б) / 4) + 120

Now, simplify the expression: 20б + 12б - 20б + 120 (20б - 20б) + 12б + 120 0 + 12б + 120 12б + 120

So, the simplified expression is 12б + 120.