1) 2.92• 10^-3 2) 2.16•10^7. 3)7.5•10^8
Answer to your equation is X=8.25
Multiply the first equation by 7 and the second equation by 2, and then add.
Step-by-step explanation:
2f - 5g=-9
-7f + 3g=4
To eliminate any variable , we need to make the coefficients same with different sign and add it
the coefficient of 'f' in first equation is 2
the coefficient of 'f' in second equation is -7
We already have different sign so we make the coefficients same
To make the coefficient same , we multiply the first equation by 7 and second equation by 2
So equation becomes
14f - 35g = -63
-14f + 6g = 8
Now when we add both equations, 'f' gets cancelled
-29g = -55
6 is c, i'm not entirely sure about 7
2 plus 2 is 4
4 plus 4 8
8 + 7 15
15 x 8 is 120
Hope this helps
-Zayn Malik
