(i) Let m be the Parmit’s marbles.
Therefore, Irfan’s marble = 5m + 7
Total number of Irfan’s marble is given by 37.
Thus, the required equation is 5m + 7 = 37
(ii) Let Laxmi’s age bey years.
Therefore, Laxmi’s father’s age = 3y + 4
But the Laxmi’s father age is given by 49
Thus the required equation is 3y + 4 = 49
(iii) Let the lowest score be l. A
Therefore, The highest score = 2l + 7
But the highest score is given by 87.
Thus, the required equation is 2l + 7 = 87
(iv) Let each base angle be ‘b’ degrees. Therefore Vertex angle of the triangle = 2b Sum of the angles of a triangle = 180° Therefore Required equation is b + b + 2b = 180° or 4b = 180°