Describe two differnt ways to solve -10=1/4(8y-12)

Question

PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

-10=1/4(8y-12)

-10{4(8y-12)}=1

-40(8y-12)=1

-320y+480=1

-320y=1-480

-320y=-479

y=-479/-320=1.497

Answer 2

Method 1, using graph paper. Try ploting the points. points on the graph

	y	z
z=1/4(8y-12)	0	-3/2
z=1/4(8y-12)	-3	0
z=-10	for all y	-10
intersection	-7/2	-10
solution	y=-7/2

 

Method 2:

Analysis

Equation is -10=1/4(8y-12)

Simplifying,

-40=8y-12

8y=12-40

8y=-28

y=-28/8

y=-7/2