Question

-4(2.3х-3)-(5-2.6х)+3(0.6х-2) при х= 5 - 12

Answer 1

-4(2.3х-3)-(5-2.6х)+3(0.6х-2)= 9,2х+12-5+2,6х+1,8х-6= 13,6х+1
При х=5/12
13 6/10*5/12+1= 13 3/5*5/12+1= 68/5*5/12+1= 17/3+1= 5 2/3+1= 6 2/3

Answer 2

To solve the expression for the given value of x, simply substitute the value of x into the expression and perform the calculations step by step:

Given expression: -4(2.3x - 3) - (5 - 2.6x) + 3(0.6x - 2)

Substitute x = 5 - 12: -4(2.3(5 - 12) - 3) - (5 - 2.6(5 - 12)) + 3(0.6(5 - 12) - 2)

Now, calculate the values within the parentheses first:

-4(2.3 * -7 - 3) - (5 - 2.6 * -7) + 3(0.6 * -7 - 2)

Simplify further:

-4(-16.1 - 3) - (5 + 18.2) + 3(-4.2 - 2)

Now calculate the products:

64.4 + 12.4 - 5 - 18.2 - 12.6 - 6

Finally, sum up the terms:

64.4 + 12.4 - 5 - 18.2 - 12.6 - 6 = 34.4 - 36.8 = -2.4

So, when x = 5 - 12, the expression evaluates to -2.4.