Find the solution of 3x+6y=12 when x =2

Question

jim_thompson5910 · Answer

Replace x with 2, then solve for y

3x+6y=12

3*2+6y=12

6+6y=12

6y=12-6

6y=6

y=6/6

y=1


So when x = 2, y = 1

anonymous · Answer

Could you possibly help me with one more? which of the following points lies on the line 3x+4y=14

jim_thompson5910 · Answer

what are your choices

anonymous · Answer

They are
-2,5
2,-5
1,-4
-1,4

jim_thompson5910 · Answer

each ordered pair is of the form (x,y)

so for instance, the point (1,-4) means x = 1 and y = -4

jim_thompson5910 · Answer

let's see if that point works or not

3x+4y=14

3*1+4(-4)=14 ... plug in x = 1 and y = -4

3 - 16 = 14

-13 = 14

that's false, so (1,-4) is NOT a solution to 3x+4y=14

anonymous · Answer

okay, would -2,5 work?

jim_thompson5910 · Answer

plug it in and find out, use the steps I showed above

jim_thompson5910 · Answer

then tell me what you get