solve using a cross multiplication
4x+3y=17
3x-4y+6=0
Answers
Answer:
- 12×+9y=51
- 12x-16y=-24
- 25y=75
- y=3and x=2
Answer:
x=-50 and y=-75
Step-by-step explanation:
step 1
4x+3y-17........ [1] {a1x+b1y+c1=0}
mark as equation one
3x-4y+6=0 ........[2] {a2x+b2y+c2=0}
mark as equation two
step 2
b1 c1 a1 b1 = +3 -17 4 3
b2 c2 a2 b2 = -4 6 3 -4
for remembering this step remenber BCAP
Step 3
x y 1
------------- = ----------------- = -----------------
b1 c1 c1 a1 a1 b1
b2 c2 c2 a2 a2 b2
x y 1
------------- = ----------------- = -----------------
+3 -17 -17 4 4 3
-4 6 6 3 3 -4
cross multiply them
x y 1
------------- = ----------------- = -----------------
[18] - [68] [-51] - [24] [-16] - [9]
x y 1
------------- = ----------------- = -----------------
18 - 68 -51 - 24 -16 - 9
x y 1
------------- = ----------------- = -----------------
-50 -75 -25
x=-50 and y=-75
hope this help u
sorry if any mistake done
thank u