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Kirsten Dorsey
Mathematics
13 February, 19:26
4a + 3c = 156
3a + 4c = 145
Solve for a and c
+1
Answers (
1
)
Karen Doyle
13 February, 19:49
0
c = 16, a = 27
Step-by-step explanation:
-3 (4a + 3c) = - 3 (156) Find a GCF
4 (3a + 4c) = 4 (145) Make one negative to cancel out one variable
-12a - 9c = - 468 Solve for C
12a + 16c = 580
7c = 112
c = 16
3a + 4c = 145 Substitute C into one of the original equations
3a + 4 (16) = 145 Solve for A
3a + 64 = 145
3a = 81
a = 27
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