Answer:
[tex]1. \: 12(3-x)=48 \\ = 3-x=\frac{48}{12} \\ = 3-x=4 \\ = -x=4-3 \\ = -x=1 \\ = x=-1 [/tex]
[tex]2. \: 2x+(x+1)+(x+2)=103 \\ = 3x+1+x+2=103 \\ = 4x+1+2=103 \\ = 4x+3=103 \\ = 4x=103-3 \\ = 4x=100 \\ = x=\frac{100}{4} \\ = x=25 [/tex]
[tex]\frac{ x }{ 3 } +1= \frac{ 7 }{ 15 } \\ = 5x+15=7 \\ = 5x=7-15 \\ = 5x=-8 \\ = x=\frac{-8}{5} \\ = x=-\frac{8}{5} [/tex]
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Answer:
[tex]1. \: 12(3-x)=48 \\ = 3-x=\frac{48}{12} \\ = 3-x=4 \\ = -x=4-3 \\ = -x=1 \\ = x=-1 [/tex]
[tex]2. \: 2x+(x+1)+(x+2)=103 \\ = 3x+1+x+2=103 \\ = 4x+1+2=103 \\ = 4x+3=103 \\ = 4x=103-3 \\ = 4x=100 \\ = x=\frac{100}{4} \\ = x=25 [/tex]
[tex]\frac{ x }{ 3 } +1= \frac{ 7 }{ 15 } \\ = 5x+15=7 \\ = 5x=7-15 \\ = 5x=-8 \\ = x=\frac{-8}{5} \\ = x=-\frac{8}{5} [/tex]