Respuesta :

Answer:

6 months

Step-by-step explanation:

115 v 145 0 month

118 v 143 first

121 v 141 second

124 v 139 third

127 v 137 fourth

130 v 135 fifth

133 v 133 sixth

Please give me brainliest if this helps!

B. 6 Months

R=115+3x

115 is his weight and 3x is Rupert gaining each month

M=145-2x

145 is his weight and -2x is Micheal losing weight

so if you plug in 6 as the x

R 133=115+3(6)

133=115+18

P 145=145-2(6)

145=145-12