I need help on all of these!

Given:

The given equation is

We need to determine the solution of the given equation.

Solution of the equation:

Step 1: To determine the value of a, first, we shall divide both sides of the equation by 3.

Thus, we get;

Simplifying, we get;

Thus, dividing both sides of the equation by 3, we get

Step 2: Finallly, subtracting both sides of the equation by 3, we have;

Simplifying, we get;

Thus, subtacting 3 from both sides of the equation, we have,

Hence, the solution of the equation is

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24