2a - 5b = 3
3a + b = 4
Multiply everything in the second equation by
5
By multiplying, your equation should look
like
2a - 5b =
3
15a + 5b = 20
now, add -5b with 5b (which means add 2a with 15a and 3 with 20 )
By adding, your equation should look
like
17a = 23 divide both
sides by 17
By dividing, your equation should look
like
a = 23/17 which is your
answer for " a "
Now plug 23 /17 into one of the
equation
3 (23/17) + b = 4
now multiply 23/17 with 3
By multiplying,
your equation should look like
69/17 + b = 4
now, subtract 69/17 on both sides
By
subtracting, you should get
= -1/17
which is your answer for " b "
So your
answer is a = 23/17 ; b =
-1/17
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