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Solve...0.2x + 0.3y =1.30.4x + 0.5y = 2.3 |
| Answer» AnswerLet 0.2x+0.3y=1.3 ....(1) 0.4x+0.5y=2.3 ....(2)Multiply eqn(1) by 10 we get2x+3y=13 ....(3)Multiply eqn(2) by 10 we get4x+5y=23 ....(4)Solving equations (3) and (4)5×(3)⇒10x+15y=653×(4)⇒12x+15y=69Subtracting we get 12x+15y−10x−15y=69−65=4or 2x=4 or x=2Substituting x=2 in eqn(3) we get2x+3y=13⇒2×2+3y=13 or 3y=13−4=9 or y=3Hence x=2,y=3 | |