Question

Tìm số nguyên x biết

a (x+5) + (x-9) = x+2

b (27-x) + (15+x) = x-24

Answer 1

a) (x+5) + (x-9) = x+2

x+5 + x-9 = x+2

(x+x-x)=2-5+9

x=6

b) (27-x)+(15+x)=x-24

27-x+15+x=x-24

42= x-24

x= 42+ 24

x= 66

tick mik nha

Answer 2

a) (x+5) + (x-9) = x+2

x+5 + x-9 = x+2

(x+x-x)=2-5+9

x=6

b) (27-x)+(15+x)=x-24

27-x+15+x=x-24

42= x-24

x= 42+ 24

x= 66