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Mathematics 9 Online
iosangel:

Victoria is 4 years older than her neighbor. The sum of their ages is no more than 14 years. Enter an inequality that can be used to represent this situation in the box, where x represents Victoria's neighbor's age.

mhchen:

"Victoria is 4 years older than her neighbor": Victoria + 4 years = Neighbor "The sum of their ages is no more than 14 years" Victoria + Neighbor is less than or equal to 14 "x represents Victoria's neighbor age" x = Neighbor let v = Victoria. Now you have these equation: \[v + 4 = x\] \[v + x < 14 \] Try to combine them.

iosangel:

like substitition method

iosangel:

or write them as one equation

mhchen:

Yeah substitute the first equation into the second equation.

iosangel:

ok v+4=x v+x<14 v-4<14

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