Question

Select all of the equations that are equivalent to 4x+20=90

1. 4(x+5)=90

2. x+5=22.5

3. 4(x+20)=90

4. x+20=22.5

5. 4x=70





pls pls tell me

Answer 1

After solving the original equation, 4x+20=90, to find x=17.5, we find that the equivalent equations are 1) 4(x + 5) = 90, 2) x + 5 = 22.5, and 5) 4x = 70.

Step-by-step explanation:

The question asks us to select all equations equivalent to 4x+20=90. Let's solve the given equation first:

4x + 20 = 90

4x = 90 - 20

4x = 70

x = 70/4

x = 17.5

Now, let's evaluate each option:

4(x + 5) = 90: This equation simplifies to 4x + 20 = 90, which is equivalent to the given equation.

x + 5 = 22.5: This simplifies to x = 17.5, which is the solution to the given equation, so it is also equivalent.

4(x + 20) = 90: Simplifying this equation would give us 4x + 80 = 90, which isn't equivalent to the initial equation.

x + 20 = 22.5: Simplifies to x = 2.5, which is not the solution we found for the given equation, so it is not equivalent.

4x = 70: This is already in the simplified form and is directly found from the given equation, making it equivalent.

Therefore, the equivalent equations to 4x + 20 = 90 are options 1, 2, and 5.

Answer 2

The answer is num 1 I think, 4(x+5)=90