jamiahharrell21
18.06.2021 •
Mathematics
What did she do wrong ?
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Ответ:
She wrongly added the equations
Step-by-step explanation:
Given
Required
Her mistake
The mistake is when she added the equations.
When both equations are added, the result is:
and not
The suggestion to avoid such mistake is for the student to check the appropriate signs of each term before adding/subtracting.
Ответ:
3x = 75
x = 25
20) 360-296=64-29=35
(x-24)=35
x = 59
21) (2+3x)=62
3x = 60
x = 20
22) 180-90=90-40=50
(6x+2)=50
6x=48
x=8