Solving Solutions Inequalities by Substitution

What is the first step in solving a system by Substitution?

• Make sure both equations are in standard form.

• Make sure at least one equation is solved for one variable.

• Make sure both equations are in slope-intercept form.

• Make sure both equations can be solved.

• (-1, 3)

• (0, -3)

• (1, 3)

• (1, -3)

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

What is the solution to this system?
x= 7 - 2y
2x + y = 5

• (-1,4)

• (4,-1)

• (1,3)

• (3,1)

Determine the solution to the inequality 10f - 8 < 32 by substitution.

• f = 4

• f > 4

• f < 2

• f < 4

Find the solution to the inequality 5b - 7 < 18 by substitution.

• b > 5

• b = 5

• b < 5

• b < 4

Solve the inequality 7e + 5 ≥ 26 using substitution.

• e > 3

• The solution to the inequality 7e + 5 ≥ 26 is e ≥ 3.

• e ≤ 3

• e = 3

The cost of a ski trip could be more than or equal to $3,200.

• x < 3200

• x > 3200

• x ≤ 3200

• x ≥ 3200

The first step in solving using the substitution method is __________.

• get x by itself

• get y by itself

• get either variable by itself

• add the equations together