What is the equivalent expression for 8+7y+2x+4y+4

You could simplify this expression, because there are multiple terms with the same variable.

8+7y+2x+4y+4
2x+7y+4y+4+8
2x+11y+12

2x+11y+12 is an equivalent expression to 8+7y+2x+4y+4

Hope this helped!

the line over the 28 means the 28 repeats forever. 1.282828 and so on let x be the rational number 1.28... we can use this trick: 100*1.282828= 128.282828... (the decimal 28 part repeats) 100x = 128.28... next: 100x - x = 128.282828... - 1.282828... the .282828... part will be subtracted away 99x = 127 divide both sides by 99 to get x= 127/99