If you are to solve this problem for j and for c, multiply the second equation by 2 and subtract from the first equation.
5j + 6c = 32 ---> 5j + 6c = 32
1j + 3c = 10 ---> x2 ---> 2j + 6c = 20
Subtract ---> 3j = 12
Divide by 3 ---> j = 4
Substitute 4 for j in the second equation: 1j + 3c = 10 ---> 1(4) + 3c = 10 ---> 4 + 3c = 10
Subtract 4 from both sides 3c = 6
Divide by 3 c = 2
A solution of this set of equations is: c = 2 and j = 4.
If you are to solve this problem for j and for c, multiply the second equation by 2 and subtract from the first equation.
5j + 6c = 32 ---> 5j + 6c = 32
1j + 3c = 10 ---> x2 ---> 2j + 6c = 20
Subtract ---> 3j = 12
Divide by 3 ---> j = 4
Substitute 4 for j in the second equation: 1j + 3c = 10 ---> 1(4) + 3c = 10 ---> 4 + 3c = 10
Subtract 4 from both sides 3c = 6
Divide by 3 c = 2
A solution of this set of equations is: c = 2 and j = 4.