Mathematics
05.04.2023 21:16
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3(x-7)+8=-20 can someone explain how to do this step by step
3(x-7)+8=-20
can someone explain how to do this step by step
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can someone explain how to do this step by step
randenbrown1653
4,9(46 marks)
3(x-7)+8=-20
Multiply the bracket by 3
(3)(x)(3(-7)+8= -20
3x-21+8= -20
3x-13= -20
Move -13 to the other side. Sign changes from -13 to +13.
3x-13+13= -20+13
3x= -7
Divide by 3
3x/3= -7/3
x= -7/3 or in mixed number : -2 1/3
Answer : x= -7/3 or in mixed number : -2 1/3
savannahsharp5981
4,9(91 marks)
Part a: the graph is linear. part b: increasing as the slope is positive ( first interval) , constant middle, decreasing last interval ( slope negative).
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