Whats the most efficient way to show all the values which are no more than 7 units away from -5

the only to show ALL values that are no more than -5 or x <= -5

is a number line that's shaded at -5 and to the left including -5 itself

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation: