Question

2x + 5y = −3
−15x − 5y = −10
Solve the following system of inequalities using elimination, substitution or graphing method.

Answer 1

just add the two, you will consquently get rid of the y variable, then just solve for x

Answer 2

I do not understand what you mean my friend :/
Is it: -15x+2x=-10?
makes no sense since that is addition, you are not eliminating nor substituting.

Answer 3

if you add the two equations you are elimintang the y variable

Answer 4

2x + 5y = −3
−15x − 5y = −10
----------------
-13x=-13

Answer 5

x=1

Answer 6

Then sub x=1 into either of the orginal inequalities and solve for y, my friend

Answer 7

2x + 5y = −3
+
−15x − 5y = −10
_______________
-13x+0=-7
-13x=-7
-7/13=x

2(-7/13)+5y=-3
-14/13+5y=-3
5y=-25/13
y=-5/13
thats what I have :)

Answer 8

2x + 5y = −3
+
−15x − 5y = −10
_______________
-13x+0=-13
-13x=-13
1=x

2+5y=-3
5y=-5
y=-1
correct answer

Answer 9

isnt that what i had x=1

Answer 10

yes the first one i did was wrong. i forgot about the signs :P again