Jharne De and Ranjana Kumar Solutions for Chapter: Simple Linear Equations, Exercise 1: Mental Maths

Determine by substitution if: 

$-4$ is the root of $3\mathrm{x}+4=16$.

Solve for $\mathrm{x}$.

$7\mathrm{x}-3\mathrm{x}+8=\mathrm{x}+2$.

Solve the following equation and find the value of $x$.

$\mathrm{x}+(\mathrm{x}+6)=(\mathrm{x}+8)+21$

Solve the following equation:

$2(\mathrm{x}+10)=3(\mathrm{x}-20)$.

Solve the following equations and check your answers:

$\frac{\mathrm{x}-5}{7}-8=\frac{2x+4}{5}$

When a term is transposed to the other side of an equation, its _____ changes.

The value of a variable for which an equation is true is known as the _____ of the equation.

If $1$ is subtracted from the LHS of an equation, the value of the RHS _____ by $1$