A+B=15 ( To solve for D, this is not necessary )
BxC=84
B=84/C *
C=4.3
B+D=18
B=-D+18 *
*=*
B=B
-D+18=((84)/4x3)
-D=((84)/4x3)-18
D=-((84)/4x3)+18
D=-7+18
D=11
The answer for D ={11}✓✓✓
solve for A ( an extra ):
B=-D+18
B=-11+18
B=7
A+B=15
A=-B+15
A=-7+15
A=8
The answer for A ={8}✓✓✓
2026-07-02 21:26:04
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