Question

Cross inultifeplixation ,ep.... x+y=7,2x+3y=11 ,

Answer 1

cross multiplication method is like this
X/b1c2-b2c1=y/c1a2-c2a1=1/a1b2-a2b1
X/1*2-3(-7) =y/-7*2-(-4*1=1/1*3-2*1
X/2+21=y/-14+4 =1/1*3-2*1
X/23 =y/-10 =1/1
X/23 = 1/1
X = 23
y/-10 = 1/1
y = -10 answer