Answer:
67
Step-by-step explanation:
its not a 90!!! tilt your screen.
First you do -13+9. That equals -4.
Then bring down -c=-4 because there is a 1 in front of the c so -1c.
Next divide both sides by -1. The -c side cancels out so then your left with -4/-1.
That equals positive 4.
C=4
That’s ur answer.
Answer:
12
Step-by-step explanation:
4x + 5y = 3 ................ (i)
kx + 15y = 9................(ii)
Dividing eqn (ii) by 3, we get,
k/3 x + 5y = 3.............(iii)
Subtracting eqn (iii) by eqn (i), we get,
-4x - k/3 x = 0
or, -(4 - k/3 )x = 0
or, 4 - k/3 = 0/x
or, 4 - k/3 = 0
or, 4 = k/3
or, k = 4*3
:. k = 12 (Ans)
Answer:
x = 3
Step-by-step explanation:
3 ( x + 1 ) = 5 ( x- 2 ) + 7
Expand
3 x + 3 = 5 x - 10 + 7
Minus 5 x from both sides
- 2 x + 3 = - 10 + 7
Minus 3 from both sides
- 2 x = - 10 + 4
Simplify
- 2 x = - 6
Divide both sides by - 2
x = 3
