\(a,565-\left(6x+70\right)=435\)
\(6x+70=565-435\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=10\)
\(b,100-7\left(x-5\right)=58\)
\(100-7x+35=58\)
\(100-7x=58-35\)
\(100-7x=23\)
\(7x=100-23\)
\(7x=77\)
\(x=11\)
a, 565-(6x+70)=435
6x+70=565-435
6x+70=130
6x=130-70
6x=60
x=60:6
x=6
b, 100-7(x-5)=58
7(x-5)=100-58
7(x-5)=42
x-5=42:7
x-5=6
x=6+5
x=11
\(a,565-\left(6x+70\right)=435\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=10\)
\(b,100-7\left(x-5\right)=58\)
\(7\left(x-5\right)=100-58\)
\(7\left(x-5\right)=42\)
\(x-5=42:7\)
\(x-5=6\)
\(x=6+5\)
\(x=11\)
a) 565-(6x+70)=435
(6x+70)=565-435
6x+70= 130
6x =130-70
6x =60
x =60:6
x = 10
b) 100-7(x-5)=58
7(x-5)=100-58
7(x-5)=42
x-5 =42:7
x-5=6
x =6+5
x =11
chúc bạn học tốt!
a)565-(6x+70)=435
(6x+70)=565-435=130
6x = 130-70= 60
x =60:6=10
b) hết biết
