5x+7y=31 , 3x-5y=21??
1 answer:
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(c) multiply by 0.4
given = 10
multiply both sides by 0.4 to eliminate the fraction
x = 0.4 × 10 = 4
and = 10
(c) multiply by 0.4
given = 10
multiply both sides by 0.4 to eliminate the fraction
x = 0.4 × 10 = 4
and = 10