Kabir solves x + 2 = 7 in one problem and gets x = 5

Kabir solves x + 2 = 7 in one problem and gets x = 5. Later, in a different problem, he sees x + 3 = 10 and assumes x is still 5, without solving again. Is Kabir right?

Want to know who's right, and why? Reason it out yourself — free, in Hindi, Hinglish or English.

Start thinking on Socho →

More disagreements in Algebra Play

A number trick: think of a number, add 5, double it, subtract 10, then halve it — you get The equation is 3x = 15 Asked to simplify 4x + 2x, Rohit says the answer must be a single number, so the question Mehar tries x=2: 2+2=4 and 2²=4, both come out equal Asked to simplify 3x + 2y, Karan writes 5xy