How To Use Casio fx-570 Calculator

Tips in Using Calculator

2 UNKNOWN EQUATION 

Example: 

2X + 4Y= 8

X + 4Y = 6

Key in the number into the calculator and you will get the answers. No need to calculate. 

First, press MODE, till you find EQN Press 1 then find UNKNOWNS Press 2 for 2 unknown equation. 

Then for a1 press 2 then press this symbol = then, for b1 press 4 then press =, for c1 press 8,  a2 press 1, b2 press 4, c2 press 6.

then you will get the answers where is x=2 and y=1.

Step by Step

MODE → EQN(1) → UNKNOWNS(2) → a1 → 2 → = → b1  4 → = → c1 → 8 → = → a2 → 1 → = b2 → 4 → = → c2 → 6 → = 

3 UNKNOWN EQUATION

Example: 

2a + 8b -4c = 4

-12a + 4b + 6c=15

6a +4b + 7c = -3

The step is same with the 2 unknown equation. For the 3 unknown equation  press UNKNOWN 

Step by Step

MODE → EQN(1) →UNKNOWNS(3) → a1 → 2 → = →b1 → 8 →= → c1 → -4 → = →d1 → 4 → = a2 → -12 = b2 → 4 = → c2 → 6 → = → d2 → 15 = a3 → 6 → = → b3 →4 → = → 7 → = → -3 → = 

You will get  X= -1, Y = 0.75,  Z= 0, which is X as a "a", Y "b" and Z "c"