Question

1)3×(2x-9)=5×(x-4) 2)7×(3-2x)=x+9

Answer 1

1)6х-27=5х-20

6х-5х=-20+27

х=7

2) 21-14Х=Х+9

-14Х+Х=9-21

-13Х=12

-Х=12/13

Х=-12/13(ДРОБЬЮ)

Answer 2

Let's solve the given equations one by one:

1. 3×(2x-9) = 5×(x-4)

Expanding the equation:

6x - 27 = 5x - 20

Now, let's isolate the variable terms:

6x - 5x = -20 + 27

x = 7

So the solution to the equation is x = 7.

2. 7×(3-2x) = x + 9

Expanding the equation:

21 - 14x = x + 9

Let's isolate the variable terms:

21 - 9 = x + 14x

12 = 15x

Dividing both sides by 15:

x = 12/15

Simplifying the fraction:

x = 4/5

So the solution to the equation is x = 4/5 or 0.8.