Solve if 5a+3b=35 and a/b = 2/5 , what is the value of a? (a) 14/5 (b) 7/2 (c) 5 (d) 7 (e) 9

14/5

Step-by-step explanation:

So first i manipulated a/b= 2/5. i multiplied both sides by 5 making it 5a/b=2. Then i multiplied both sides by b making it 5a=2b. Then i substituted 2b into 5a+3b=35. Making it 2b+3b=35. then i simplified it making it 5b=35. Then i solved for b making it b=7. Then i substituted b into 5a+3b=35. So that it looked like this 5a+3*7=35. then it became 5a+21=35. Then you subtract 21 making it 5a=14. You then divide by 5 making it a=14/5

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8