I may not know the answer. My son did this to brush up. He is weak in this. Can

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secondary 3 | A Maths
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secondary 3 A Maths Singapore

I may not know the answer. My son did this to brush up. He is weak in this. Can anyone tell me if he is answering right or wrong? Thanks

Date Posted: 4 years ago

4 years ago

For b) and c) , no need to put + for the positive numbers

4 years ago

For d), it should be

2x + 9 = 0
2x = -9
x = -9/2 = -4½

4 years ago

For e),

7x + 6 = 0
7x = -6
x = -6/7