So if we want to know the common solution(s) to a system of 2 equations, So we can just set both equations equal to each other and solve for the x value(s). That’s where I start below;

2x^2-13x+21 = 2x^2+9x-56
2x^2 cancels out and moving everything to one side and anything with an x variable to the other side we have then;
-22x=-77
22x=77 by cancelling the negative signs
x=77/22 therefore x=7/2 or 3.5

Hope this helps you. Any questions please ask.

4 0

3 years ago

Help I need to know how to solve for x

lara [203]

Answer:

the answer would be x=3

Step-by-step explanation:

the lines the have 1 line across it equal the same. same for the ones with 2. for example AB has one line across so it also equals CD because it has one line across (in the little octagonal shape). BC has two lines and so does AH so BC=AH

3 0

3 years ago

Please help.............

natta225 [31]

Answer:

...........

2(x + 2) + 2x = 20

6 0

3 years ago

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