Solve the equation; 3x - 2y = 7, x + 2y = -3
...Solve the equation; 3x - 2y = 7, x + 2y = -3
x = 1, y = -2
x = 1, y = 3
x = -2, y = -1
x = 4, y = -3
Correct answer is A
3x - 2y = 7; Solve by elimination method
x + 2y = -3
3x - 2y = 7.....(i)
-3x + 6y = -9.....(ii)
-8y = 16
y = 16−8=−2
Put y = -2 into equation (i); 3x - 2y = 7
3x - 2(-2) = 7
3x + 4 = 7
3x = 7 - 4
3x = 3
x = 33 = 1
If log 5.957 = 0.7750, find log 3√0.0005957...
Evaluate: 0.21×0.072×0.000540.006×1.68×0.063 ...
calculate the surface area of a sphere of radius 7cm [Take π = 22/7] ...
Find the size of each exterior angle of a regular octagon ...
If n(P) = 20 and n(Q) = 30 and n(PuQ) = 40, find the value n(PnQ) ...