Solve an equation with variables on both sides

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Presentation transcript:

Solve an equation with variables on both sides EXAMPLE 1 Solve an equation with variables on both sides Solve 7 – 8x = 4x – 17. 7 – 8x = 4x – 17 Write original equation. 7 – 8x + 8x = 4x – 17 + 8x Add 8x to each side. 7 = 12x – 17 Simplify each side. 24 = 12x Add 17 to each side. 2 = x Divide each side by 12. ANSWER The solution is 2. Check by substituting 2 for x in the original equation.

Solve an equation with variables on both sides EXAMPLE 1 Solve an equation with variables on both sides CHECK 7 – 8x = 4x – 17 Write original equation. 7 – 8(2) = 4(2) – 17 ? Substitute 2 for x. –9 = 4(2) – 17 ? Simplify left side. –9 = –9 Simplify right side. Solution checks.

Solve an equation with grouping symbols EXAMPLE 2 Solve an equation with grouping symbols 9x – 5 = 1 4 (16x + 60). Solve 1 4 (16x + 60) 9x – 5 = Write original equation. 9x – 5 = 4x + 15 Distributive property 5x – 5 = 15 Subtract 4x from each side. 5x = 20 Add 5 to each side. x = 4 Divide each side by 5.

GUIDED PRACTICE for Examples 1 and 2 Solve the equation. Check your solution. 1. 24 – 3m = 5m 3 ANSWER

GUIDED PRACTICE for Examples 1 and 2 Solve the equation. Check your solution. 2. 20 + c = 4c – 7 ANSWER 9

GUIDED PRACTICE for Examples 1 and 2 Solve the equation. Check your solution. 3. 9 – 3k = 17k – 2k ANSWER –8

GUIDED PRACTICE for Examples 1 and 2 Solve the equation. Check your solution. 4. 5z – 2 = 2(3z – 4) ANSWER 6

GUIDED PRACTICE for Examples 1 and 2 Solve the equation. Check your solution. 5. 3 – 4a = 5(a – 3) ANSWER 2

GUIDED PRACTICE for Examples 1 and 2 Solve the equation. Check your solution. 8y – 6 = 2 3 (6y + 15) 6. ANSWER 4