B1:
4 + x : 6 = 7
<=> x : 6 = 3
<=> x = 18
B2:
96 - (x + 1) = 42
<=> x + 1 = 50
<=> x = 49
\(4+x:6=7\)
\(x:6=7-4\)
`x:6=3`
`x=3*6`
`=>x=18`
\(96-\left(x+1\right)=42\)
`x+1=96-42`
`x+1=54`
`x=54-1`
`=>x=53`
`1)`
4 + x : 6= 7`
`=> x : 6 = 7 - 4`
`=> x : 6 = 3`
`=> x = 3 xx 6`
`=> x = 18`
`2)`
`96 - (x+1) = 42`
`=> x + 1 = 96 - 42`
`=> x + 1 = 54`
`=> x = 54 - 1`
`=> x = 53`
\(x:6=3\\ x=3.6\\ x=18\\ 2,\\ x+1=96-42\\ x+1=54\\ x=54-1\\ x=53\)
1
4 + x : 6 = 7
x : 6 = 7- 4
x : 6 = 3
x = 3 x 6
x = 18
2.
96-(x+1)=42
x +1 = 96 - 42
x + 1 = 54
x = 54-1
x = 53