The numbers $x$ and $y$ satisfy $x + y = 9$ and $x - y = 3$ . What is the value of $x$ ?

Practise more Equations, inequalities and logarithms.

Free questions with an explanation for every one, and full timed National Benchmark Tests (NBT) mock tests.

All Equations, inequalities and logarithms questions Take a mock test

More Equations, inequalities and logarithms questions

What is the remainder when $f (x) = x^{3} - 3 x^{2} - 3 x - 1$ is divided by $(x + 3)$ ?
What is the remainder when $f (x) = x^{3} + x^{2} + 6$ is divided by $(x - 2)$ ?
What is the remainder when $f (x) = x^{3} + 2 x^{2} + x + 5$ is divided by $(x - 2)$ ?
What is the remainder when $f (x) = x^{3} - 4 x^{2} - 5 x - 3$ is divided by $(x + 1)$ ?
What is the remainder when $f (x) = x^{3} + x^{2} + 3 x - 1$ is divided by $(x - 1)$ ?
What is the remainder when $f (x) = x^{3} - 4 x + 6$ is divided by $(x + 2)$ ?