Jayashri Bhattacharya and Tarika Dhawan Solutions for Exercise 4: CHAPTER INNINGS

Write an algebraic expression for the following:

Thrice the sum of a number and $40$.

Write the general formula for the following pattern of houses made from matchsticks and hence deduce the number of matchsticks required to make $7$ such houses:

Find whether the given values satisfy the equation or not and hence find the solution to the equation:

$x+12=5 (3,4,-7,-5)$

Find whether the given values satisfy the equation or not and hence find the solution to the equation:

$25-x=16 (5,-5,8,-8,9,-9)$

Find whether the given values satisfy the equation or not and hence find the solution to the equation:

$5y=30 (2,4,6,-6)$

Find whether the given values satisfy the equation or not and hence find the solution to the equation:

$\frac{16}{y}=-2 (8,-8,10,-10,12,-12)$

Find whether the given values satisfy the equation or not and hence find the solution to the equation:

$\frac{z}{4}=-2 (6,8,-8,-16)$

Find whether the given values satisfy the equation or not and hence find the solution to the equation:

$-16=4x (3,-3,4,-4,5,-5)$