alleryજો a + b = 10 અને a - b = 4 હોય, તો a નું મૂલ્ય શું છે?
A6
B8
C7
D3
Answer & Solution
Correct answer: C. 7
બંને સમીકરણોનો સરવાળો કરતા: 2a = 14 => a = 7.
Keep practising Elementary Algebra
Browse all Elementary Algebra questions for RRB NTPC, or explore more Mathematics topics.
Related questions
RRB NTPC · Algebraic ExpansionsRRB NTPC · Solving Linear EquationsExpand and simplify the algebraic expression: (x + 3)(x - 3)Evaluate the quadratic expression 2x^2 + 5x - 4 when x = 3:Solve for x: 3x - 7 = 14. What is the value of x?RRB NTPC · Solve Linear EquationsWhen a system of two lines on the plane has no intersection, what is its solution set?In elementary algebra, what term designates letters used to represent non-specified number