(390+470)I_a-470I_b=5
-470I_a+(750+470)I_b=-12
Solve for I_a
x + y + z = 6
2x + 4y + 2z = 16
- x + 5y - 4z = - 3
(-x+12x)/6=1
133/160 as a decimal
3x+4y=7
2x-6y=-17
x-7 divided by 3 = 4
make t the subject of p=t+u/2
solve 2 { x }^{ 2 } -9x+4 > 0
alcula el DCM 15 y 26
make n the subject of this formula
w=an + z
