Simplify the following expressions: (a) 6(x+9)-2(x+3)-3 (b) 2xy-4x-5+17xy+20x-18 Q6. Simplify the following expressions for the given values of the variables.
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Answer:
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Step-by-step explanation:
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Answer:
- 6(x+9)-2(x+3)-3 = 4x +45
- 2xy-4x-5+17xy+20x-18 = 19xy +16x - 23
Step-by-step explanation:
- 6(x+9)-2(x+3)-3
= 6(x) + 6(9) - 2(x) - 2(3) - 3
= 6x + 54 - 2x - 6 - 3
= 6x - 2x + 54 - 6-3
= 4x + 54 - 9
= 4x +45
- 2xy-4x-5+17xy+20x-18
= 2xy + 17xy -4x+ 20x -5 - 18
= (2 + 17) xy + (-4 + 20)x + (-5 -18)
= 19xy +16x - 23
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