Answer:
x= infinite
Step-by-step explanation:
12+8x-8=8x+4
4+8x=8x+4
Answer:
x=10 and x-7 is the answer
Step-by-step explanation:
a)2x-7=13
2x=13+7
2x=20
x=20/2
x=10
b)3x+4=25
3x=25-4
3x=21
x=21/3
x=7
i hope it will help you
You can group first two conjunctions and second two:

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In first brackets you have common

and in second brackets common is 5:

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The answe would be 300 because, the perimeter of the windows is 12, then you have to multiply 25 to 12 then bam you get 300, yay!