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Activity 1: Determine if the ff. are expressions or equations 1)7x Answer: 2)(6-3) – 1 = 2 3) 14 = 7(2) 4)X + 9 = 13 5) 12 – 5 =​

Activity 1 Determine If The Ff Are Expressions Or Equations 17x Answer 263 1 2 3 14 72 4X 9 13 5 12 5 class=

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Answer:

4x + 3y = -5 (Eq 1); 3x + 5y = -12 (Eq 2) Eliminate x Eq 1 times

3: 12x + 9y = -15 Eq 2 times 4: 12x +20y = -48 Subtract Eq 1 from

Eq 2 11y = -48-(-15) ie 11y = -33 y = -3 Substitute in Eq 1: 4x - 9

= -5, ie 4x = 4 so x = 1 Check in Eq 2: (3 x 1) + (5 x -3) = 3 - 15

= -12. QED

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