Question

SOLVE THE FOLLOWING SYSTEM OF EQUATION BY ELIMINATION AND
SUBSTITUTION METHOD
6)
5x+4y -30, 3x - y = -18
0) 2x+8y = 6, -5-20
-15
GW) 8x+y*-16, -3xy
(M) 4x^3y = 6,6% -7y -20
W * 4+245
(V) Three chairs and two tables cost Rs.700 and five chairs and three
tables cost Rs.1100. What is the total cost of 2 chairs and 3 tables?
(vi) in a rectange, if the length is increased and the breadth is reduced
each by 2 cm then the area is reduced by 28 cm. If the length is
reduced by 1 cm and the breadth increased by 2 cm, then the area
Increases by 33 cm. Find the area of the rectangle

Answer 1

Step-by-step explanation:

1. let length= x , breadth= y
2. from the data given,
3. equation A: (x+2)(y-2) = xy-28
4. equation B: (x-1)(y+2)= xy+33
5. by solving both equation we get, -2x+2y= -24 & 2x-y= 35
6. so , by solving above equations of step 5 we get y= 11 and x= 23
7. so area = 253 square unit