Question

5. If x = 1 and y = 2 then find the values of the following algebraic expressions with solutions
(i) 3x + 4y
(ii) -2x +9y
(iii) 5x - 3y
(iv) x+5y-6​

Answer 1

Answer:

3×1+4×2

= 3+8

= 11

-2×1+9×2

= -2+18

= 16

5×1-3×2

= 5-6

= -1

1+5×2-6

= 1+10-6

= 11-6

= 5

Answer 2

Answer:

1) 3x+4y=3×1+4×2= 3+8= 11

2) -2x+9y= -2×1 +9×2=-2+18=16

3) 5x-3y=5×1-3×2=5-6=1

4) x+5y-6=1+5×2-6=11-6=5