Question

- 2.6×(6+5x)-1.5=-21

Answer 1

- 2.6×(6+5x)-1.5=-21
-15,6-13х-1,5=-21
-17,1-13х=-21
-13х=-21+17,1
-13х=-3,9
х= -3,9:(-13)
х=0,3

Answer 2

Let's solve the given equation:

2.6×(6+5x)-1.5=-21

First, we'll simplify the left-hand side by distributing 2.6 across the parentheses:

15.6 + 13x - 1.5 = -21

Next, we'll combine like terms on both sides of the equation:

13x + 14.1 = -21

Then, we'll isolate the variable x by subtracting 14.1 from both sides:

13x = -35.1

Finally, we'll solve for x by dividing both sides by 13:

x = -2.7

Therefore, the solution to the equation 2.6×(6+5x)-1.5=-21 is x = -2.7.