SOLUTION: Please help.. solve: 1)4x + 3y =7 2) 16x + 12y = 28 Thank you so much....Rebecca

Question 309181: Please help..
solve:
1)4x + 3y =7
2) 16x + 12y = 28

Thank you so much....Rebecca
Found 3 solutions by JBarnum, nyc_function, jim_thompson5910:
Answer by JBarnum(2146)   (Show Source): You can put this solution on YOUR website!
when u multiply the top equation by 4 then subtract the eqations u get 0=-21
so x=y
so if u look at the first equation theres only 1 possible number that x and y can both be and same for 2nd equation
4+3=7
16+12=28
so
x=1
y=1
Answer by nyc_function(2741)   (Show Source): You can put this solution on YOUR website!
HINT: Use the substitution method for systems of linear equations in two variables. Can you do it now?
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Hint: If you multiply both sides of the first equation by -4, you get . Now add this to the second equation and you'll find that the 'y' terms cancel out. This will leave you with an equation in which you can solve for 'x'.
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