Question

№4 1) 310-(х-70)=0 2) 180:(110-х)=18 3) 25х-7х+2х=40 4)33х-16х-4х=78

Answer 1

1)310-(x-70)=0

    x=310+70

   x= 380

2)180:(110-x)=18

110-x=180:18

110-x=10

x=110-10

x=100

3)25x-7x+2x=40

20x=40

x=40:20

x=2

4)33x-16x-4x=78

13X=78

x=78:13

x=6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Answer 2

1).х-70=310-0

х-70=310

х=310+70

х=380

2)110-х=180/18

110-х=10

х=110-10

х=100

3)(25-7+2)*х=40

х=40/20

х=2

4)(33-16-4)*х=78

х=78/13

х=6

Answer 3

Let's solve each equation step by step:

1. 310 - (x - 70) = 0

First, let's simplify the equation:

310 - x + 70 = 0

Combine like terms:

380 - x = 0

Now, isolate x by subtracting 380 from both sides:

-x = -380

Multiply both sides by -1 to solve for x:

x = 380

So the solution to the first equation is x = 380.

2. 180 : (110 - x) = 18

First, let's simplify the equation:

180 / (110 - x) = 18

Multiply both sides by (110 - x):

180 = 18(110 - x)

Distribute the 18:

180 = 1980 - 18x

Now, isolate x by subtracting 1980 from both sides:

-18x = -1800

Divide both sides by -18 to solve for x:

x = 100

So the solution to the second equation is x = 100.

3. 25x - 7x + 2x = 40

Combine like terms on the left side:

20x = 40

Divide both sides by 20 to solve for x:

x = 2

So the solution to the third equation is x = 2.

4. 33x - 16x - 4x = 78

Combine like terms on the left side:

13x = 78

Divide both sides by 13 to solve for x:

x = 6

So the solution to the fourth equation is x = 6.

To summarize:

1. x = 380
2. x = 100
3. x = 2
4. x = 6