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
Explanation
Substitute x = 2 into the equation: 3(2) + 4y = 10 => 6 + 4y = 10 => 4y = 4 => y = 1
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