Question

A+A+A=30A+B+B=20B+2C+2C=13A+B*C = ?​

Answer 1

A = 10

B = 20 - 10 = 10 ÷ 2 = 5

C = 13 - 5 = 8 ÷ 2 = 4 ÷ 2 = 2

A + B*C =?

10 + 5 * 2 = 20

Answer 2

Let's solve this system of equations step by step.

1. A + A + A = 30 Simplifying this equation, we get: 3A = 30 Divide both sides by 3: A = 30 / 3 A = 10

2. A + B + B = 20 Simplifying this equation, we get: 2B + A = 20 We already know A = 10, so substitute that in: 2B + 10 = 20 Subtract 10 from both sides: 2B = 10 Divide both sides by 2: B = 10 / 2 B = 5

3. 2C + 2C = 13 Simplifying this equation, we get: 4C = 13 Divide both sides by 4: C = 13 / 4 C = 3.25

Now, we have the values of A, B, and C:

A = 10 B = 5 C = 3.25

4. A + B * C Substitute the values of A, B, and C into this expression: 10 + 5 * 3.25

Now, perform the multiplication first: 10 + 16.25

Finally, add the two numbers together: 10 + 16.25 = 26.25

So, A + B * C = 26.25.