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হোম›নবম-দশম শ্রেণি›English Version›Mathematics›Equations in One Variable›C-05-Q155

C-05-Q155mediumsingle_mcq

The transposition rule " $a + c = b \Rightarrow a = b - c$ " applies because—

aaddition is commutative
bsubtracting $c$ from both sides preserves equality
cmultiplication is associative
ddivision by zero is allowed

ব্যাখ্যা

Equality is preserved when the same quantity is subtracted from both sides. Subtracting $c$ from each side of $a+c=b$ directly yields $a=b-c$ , which is the justification for transposition.

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Equations in One Variable — সব প্রশ্ন দেখুন (170টি) →