Answer: a) (3,0.5) b)(28/13, 47/13)
1)7x+4y=23
8x-10y=19
70x+40y=230
32x-40y=76
102x=306
x=306/102=3
7(3)+4y=23
21+4y=23
4y=2
y=1/2
2)Step-by-step explanation:
11x-6y=2
-8x+5y=3
Multiply the first equation by 5 and the second by 6.
55x-30y=10
-42x+30y=18
Now add both of the new equations
13x=28
x=28/13
Now plug it into the first equation to find y
11(28/13)-6y=2
308/13-6y=2
y=47/13