Mathematics for IGCSE & O level - Equations (Section 7 - No. 47)
If you solve 3x + 4y = 10 and x = 2 using substitution, what is the value of y?
1
2
-1
1/2
Explication
Substitute x = 2 into the equation: 3(2) + 4y = 10 => 6 + 4y = 10 => 4y = 4 => y = 1