dwalker05
dwalker05
19-12-2019
Mathematics
contestada
Find the value of 3u-8 given that -7u + 9=2
Respuesta :
Yang100
Yang100
19-12-2019
Answer:
-5
Step-by-step explanation:
-7u+9=2
-7u=2-9
-7u=-7
7u=7
u=7/7
u=1
3(1)-8=3-8=-5
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lauren6751
lauren6751
19-12-2019
Step 1: Solve for u using the equation -7u+9=2
-7u+9=2
-9 -9
_________
-7u=-7
__ __
-7 -7
_________
U=-1
Step 2: Substitute u into 3u-8
3u-8
3(-1) -8
-3 -8
-11
The value of 3u-8 is -11
Hope this helps comment below for more questions :)
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