Question 1019990
S = M+4 We'll use this value for S next:
2S+5M = 64 Now substitute for S:
2(M+4)+5M = 64
2M+8+5M = 64
7M = 64-8 = 56
M = 56/7
M = 8
Now we know that Matthew is 8. And the problem says that Susan is 4 years older:
8+4 = 12 is Susan's age.
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Check:
2s+5M = 64
2(12)+5(8)= 64
24+40 = 64 We have the correct answer
J