Practice30 Create account

Solve: $3 x - 2 y = 4$ and $x + y = 7$ by substitution. Find $y$ .

Class 10Substitution MethodAlgebra — Systems of Equations

A6.8
B4.4
C3.4
D2.4

Step-by-Step Solution

From

x + y = 7, x = 7 - y

. Substitute:

3 (7 - y) - 2 y = 4, 21 - 5 y = 4, 5 y = 17, y = 3.4

.

Answer: C) 3.4

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Substitution Method practice questions

More Class 10 Substitution Method practice

Solve by substitution: 2x + 5y = 16 and 3x = 2y + 5. Find x.In a shop in Pune, 1 notebook and 1 pen cost Rs 50 together. A notebook costs Rs 20 more…Anita is 3 times as old as her son Rahul. In the equation a = 3r, with a + r = 48 (sum…A rectangular garden in Jaipur has length 4 m more than its width. Its perimeter is 36…Two friends, Meena and Sara, together have Rs 200. Meena has Rs 40 more than Sara. Form…