engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Quantitative Aptitude Simplification Surds and Indices
समीकरण युग्म 3x+y = 81 तथा 81x-y = 9 का हल है :
1
x = \(\frac{7}{4}\), y = \(\frac{21}{4}\)
2
x = \(\frac{9}{4}\), y = \(\frac{7}{4}\)
3
x = \(\frac{7}{4}\), y = \(\frac{9}{4}\)
4
x = 3, y = 1