alleryStart learning →Find x - (y - z) when x = 10, y = 7 and z = 2.
A5
B15
C1
D3
Answer & Solution
Correct answer: A. 5
The bracket is 7 - 2 = 5, so 10 - 5 = 5; dropping the bracket needs +z.
Keep practising Expressions Using Letter-Numbers
Browse all Expressions Using Letter-Numbers questions for Olympiad (Class 7), or explore more Mathematics topics.
Related questions
A chain of n triangles uses 2n + 1 sticks. With 25 sticks, n isIf p = 2q, the expression 3p + 2q equalsA notebook costs n and a pen costs p. Cost of 3 notebooks and 2 pens?A taxi charges ₹20 plus ₹12 per km. Fare for d km isFencing costs ₹15 per metre. A square plot has side s m. Cost of fencing?A triangle has sides x, x + 2 and 2x - 1. Its perimeter isAdd (3x + 2y) and (4x - 5y).A student writes 5a + 3b = 8ab. This is wrong because