can you please show me how to do by the eliniation methodonly,not the grapg meth

Question

can you please show me how to do by the eliniation methodonly,not the grapg method   thank if you coould show me the steps I would appreciate it 1)6x-9y=13.5    7y-2x=6.5        need an orderedpair 2)3(a-b)=3    4a=b+2          needan ordered pair     THANK YOU !!! can you please show me how to do by the eliniation methodonly,not the grapg method   thank if you coould show me the steps I would appreciate it 1)6x-9y=13.5    7y-2x=6.5        need an orderedpair 2)3(a-b)=3    4a=b+2          needan ordered pair     THANK YOU !!!

Explanation / Answer

First you need to solve for one variable in one of the twoequations. For example, 3x+4y=5 x-y=4 I would use the easiest equation to solve: Step 1: using the second equation, I find that x = y+4; Step 2: plug that result into the first equation for the xvariable, 3(y+4)+4y=5 Step 3: Solve for other variable 'y', 3y+12+4y=5 ==>7y+12=5 ==> 7y = -7 ==> y = -1 Step 4: Plug the result from step 3 into either equation(usually take the easier equation), x-(-1)=4 ==> x+1=4 ==>x=3 Step 5: your ordered pair where these two lines intersect is(3, -1) I could have answered all three, but I was told to show youhow to do it only. Please rate

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