alleryStart learning →Simplify 3x + (-7x).
A-10x
B-4x
C-4
D4x
Answer & Solution
Correct answer: B. -4x
The coefficients combine as 3 - 7 = -4, so the result is -4x.
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).Find x - (y - z) when x = 10, y = 7 and z = 2.