Question

70+(x-20)=110900-(400+x)=350 ​

Answer 1

Ответ:

70+(x-20)=110

70+x-20=110

70-20+x=110

50+x=110

x=110-50

x=60

____________

70+(60-20)=110

900-(400+x)=350

900-400+x=350

500+x=350

x=500-350

x=150

_______________

900-(400+150)=350

Answer 2

Ответ:

x=60

x=150

Пошаговое объяснение:

70+(x-20)=110

x-20=110-70

x-20=40

x=40+20

x=60

900-(400+x)=350

-(400+x)=350-900

-(400+x)=-550

-400-x=-550

-x=-550+400

-x=-150

x=150

Answer 3

Let's solve this equation step by step.

First, we'll work on the equation:

70 + (x - 20) = 110900 - (400 + x) = 350

1. Start by simplifying both sides separately:

   On the left side, simplify the expression inside the parentheses: 70 + x - 20 = 110900 - (400 + x) = 350

   This simplifies to: 50 + x = 110900 - 400 - x = 350

2. Now, we want to isolate the variable x. Let's move the x terms to one side of the equation:

   Add x to both sides of the equation on the left side: 50 + x + x = 350

   This simplifies to: 2x + 50 = 350

3. Next, subtract 50 from both sides of the equation to isolate the 2x term:

   2x + 50 - 50 = 350 - 50

   This simplifies to: 2x = 300

4. Finally, divide both sides by 2 to solve for x:

   (2x) / 2 = 300 / 2

   This simplifies to: x = 150

So, the solution to the equation is x = 150.