{2x+5y=26} {3x+4y=26}
Mathematics
salima3oma
Question
{2x+5y=26} {3x+4y=26}
1 Answer

1. User Answers texaschic101
2x + 5y = 26....multiply by 3
3x + 4y = 26...multiply by 2

6x + 15y = 78 (result of multiplying by 3)
6x  8y =  52 (result of multiplying by 2)
add
7y = 26
y = 26/7 (or 3 5/7)
2x + 5y = 26
2x + 5(26/7) = 26
2x + 130/7 = 26
2x = 26  130/7
2x = 182/7  130/7
2x = 52/7
x = 52/7 * 1/2
x = 52/14 which reduces to 26/7 (or 1 5/7)
solution is : (26/7, 26/7)